Welcome to my Sony A7 IV Memory Card Guide.
So far I’ve tested 21 CFexpress Type-A cards, 21 UHS-II and 3 UHS-I memory cards to see how they actually perform in-camera as opposed to what the label says.
This guide should help you to find the best memory cards for your needs and also help you to avoid spending more money than you really need to.
Table of Contents[Hide][Show]
- Which Cards to Buy?
- Quick In-Camera Card Speed Comparison
- Which Memory Cards are Supported?
CFexpress Type-A Memory Card Buffer Tests+−
- Nextorage NX-A1PRO CFexpress Type A
- Delkin Devices BLACK CFexpress Type A 4.0
- Angelbird AV PRO CFexpress 2.0 Type A SE
- Lexar Professional CFexpress Type-A Gold Series
- ProGrade Digital CFexpress 4.0 Type A Iridium
- OWC Atlas Pro CFexpress 4.0 Type A
- Pergear Standard CFexpress Type A
- Angelbird AV PRO CFexpress 4.0 Type A
- Sony CEA-G Tough CFexpress Type-A
- Lexar Professional CFexpress Type A Silver Series
- Delkin Devices BLACK CFexpress Type-A
- Delkin Devices POWER CFexpress Type-A
- ProGrade Digital CFexpress Type-A Cobalt
- Sony CEA-M Tough CFexpress Type A
- ProGrade Digital CFexpress 2.0 Type A Gold
- Exascend Essential CFexpress Type-A
- Pergear Prime CFexpress Type A
- Pergear Master 4.0 CFexpress Type A
- Novachips Express 4.0 CFexpress Type A
- Nextorage NX-A1SE CFexpress Type A
- Nextorage NX-A2SE CFexpress Type A
UHS-II SD Memory Card Buffer Tests+−
- Delkin Devices BLACK V90 UHS-II SDXC
- Sony SF-G Tough UHS-II SDXC
- Delkin Devices 64GB POWER UHS-II SDXC
- SanDisk Extreme Pro UHS-II SDXC (300/300)
- OWC Atlas Ultra UHS-II SDXC
- Nextorage NX-F2PRO Series UHS-II SDXC
- Lexar Professional 2000X UHS-II
- Kingston Canvas React Plus UHS-II SDXC
- ProGrade V90 UHS-II
- Integral UltimaPro X2 UHS-II SDXC
- PNY X-PRO 90 UHS-II SDXC
- Exascend Catalyst UHS-II SDXC
- Angelbird AV Pro Mk 2 V90
- Transcend SD 700S UHS-II
- Nextorage NX-F2SE Series UHS-II SDXC
- Sony SF-M Tough UHS-II
- Sony SF-M UHS-II
- ProGrade V60 UHS-II
- Angelbird AV Pro MK2 V60 UHS-II SDXC
- Sony SF-E UHS-II
- Lexar Professional 1667X UHS-II
- Memory Cards for Recording Video
- Memory Cards for S&Q Motion Shooting
- What Size Memory Card Do You Need?
- How Many Images Can Be Recorded on a Memory Card?
- Movie Record Times
- Simultaneous Recording Slot 1 + Slot 2
- Sort RAW / JPEG
- Dual Card Setup Guide
- Summary
- FAQs
- Sony A7 IV Guides & Resources
Which Cards to Buy?
To save you the trouble of wading through all of my test results, these are my recommended memory cards for the Sony A7 IV.
CFexpress Type A Cards
Premium:
- Delkin Devices BLACK 4.0
- Nextorage NX-A1PRO
- Lexar Professional Gold Series
- ProGrade Digital 4.0 Iridium
Mid-range:
Budget:
UHS-II SD Cards
Premium:
Mid-range:
Budget:
Quick In-Camera Card Speed Comparison
Here are my in-camera card speed comparison results for all of the CFexpress Type-A and UHS-II SD cards that I’ve tested so far in my Sony A7 IV with firmware 5.0.
If you scroll down a little further you will find my complete buffer test results for each memory card tested.
Best CFexpress Type-A Memory Cards for Sony A7 IV
Because the A7IV only writes at around 420 MB/s when shooting uncompressed RAW images most of the CFexpress Type A cards tested here will not hit the buffer.
The only exception here are the Nextorage NX-A1SE and Nextorage NX-A2SE cards which do hit the buffer after only 208 and 204 shots.
To see these cards tested a little harder please visit my Sony A1 Memory Card Guide. I’ve listed the cards here based on how they perform in my A1.
Best UHS-II SD Memory Cards for Sony A7 IV
These tests were done using my Sony A7 IV with firmware version 5.0. Unlike the CFexpress cards you will hit the buffer when using UHS-II cards.
| Memory Card | Price Check | Max Burst | Buffer Clearing Time * | Video Speed Rating |
|---|---|---|---|---|
| Delkin Devices BLACK V90 | B&H | Memory Wolf UK | 23 | 4.30s | V90 |
| Sony SF-G Tough | Amazon | B&H | 23 | 4.30s | V90 |
| Delkin Devices POWER | Amazon | B&H | Memory Wolf UK | 23 | 4.30s | V90 |
| SanDisk Extreme Pro | Amazon | B&H | 23 | 4.30s | V90 |
| OWC Atlas Ultra | Amazon | B&H | 23 | 4.31s | V90 |
| Nextorage NX-F2PRO V90 | Amazon | B&H | 23 | 4.31s | V90 |
| Lexar Professional 2000X | Amazon | B&H | 23 | 4.32s | V90 |
| Kingston Canvas React Plus | Amazon | B&H | Memory Wolf UK | 23 | 4.40s | V90 |
| ProGrade V90 | Amazon | B&H | 23 | 4.45s | V90 |
| Integral UltimaPro X2 | Amazon | 23 | 4.48s | V90 |
| PNY X-PRO 90 | Amazon | B&H | 23 | 4.49s | V90 |
| Exascend Catalyst | Amazon | B&H | 23 | 4.60s | V90 |
| Angelbird AV Pro Mk 2 V90 | Amazon | B&H | Memory Wolf UK | 23 | 4.65s | V90 |
| Transcend SD 700S | Amazon | B&H | 23 | 4.65s | V90 |
| Nextorage NX-F2SE V60 | Amazon | B&H | 20 | 5.45s | V60 |
| Sony SF-M Tough | Amazon | B&H | 17 | 6.81s | V60 |
| Sony SF-M | Amazon | B&H | 17 | 6.81s | V60 |
| ProGrade V60 | Amazon | B&H | 17 | 7.13s | V60 |
| Angelbird AV Pro MK2 V60 | Amazon | B&H | Memory Wolf UK | 15 | 10.15s | V60 |
| Sony SF-E | Amazon | B&H | 15 | 13.03s | V30 |
| Lexar Professional 1667X | Amazon | B&H | 15 | 14.01s | V30 |
Sony A7 IV Price Check at: B&H Photo
If you find this article helpful then you may also like my Sony A7 IV Accessories Guide and Lenses Guide.
Sony A7 IV Forum & Facebook Group
If you are looking for further help and advice on the a7 IV or would simply like to share your photos and videos, then please head over to our friendly full-frame Forum. If you prefer Facebook then we also run the Sony A7 IV Shooters Group.
Which Memory Cards are Supported?
The Sony A7IV has two memory card slots, here are the cards that each slot supports:
- Slot 1: CFexpress Type A (2.0 & 4.0) and UHS-I and UHS-II (SDHC/SDXC) SD cards
- Slot 2: Only UHS-I and UHS-II (SD/SDHC/SDXC) cards
CFexpress Type A 4.0 cards will work in the A7IV because they are backwards compatible with the 2.0 standard, but you will not be able to take advantage of 4.0 speeds in-camera. That said, due to the maximum 10 fps drive speed and 33 megapixel sensor the 2.0 cards are fast enough.
CFexpress Type-A Memory Card Buffer Tests
If you shoot a lot of continuous bursts and demand the fastest buffer clearing times then you’ll want to use a CFexpress Type-A card.
Here are all of the cards that I have tested so far in my A7IV with firmware version 5.00.
I don’t take more than 500 shots because I don’t think many of you will be shooting 500 shot bursts with the A7IV.
To see these cards tested a little harder please visit my Sony A1 Memory Card Guide.
Nextorage NX-A1PRO CFexpress Type A
- CFexpress Standard: 2.0
- Max Read Speed: 950 MB/s
- Max Write Speed: 600 MB/s (40 GB) / 950 MB/s (80/160/320/640 GB)
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: 550 MB/s (40 GB) / 850 MB/s (80/160/320/640 GB)
- Minimum Sustained Write Speed: 400 MB/s
- Video Performance Guarantee (VPG): 400
- Capacities: 40 GB / 80 GB / 160 GB / 320 GB / 640 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 160 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Nextorage NX-A1PRO CFexpress Type A
At: Amazon | B&H Photo | Memory Wolf UK
Delkin Devices BLACK CFexpress Type A 4.0
- CFexpress Standard: 4.0
- Max Read Speed: 1830 MB/s
- Max Write Speed: 1710 MB/s (480GB) / 1740 MB/s (960GB)
- Max Sustained Write Speed: 500 MB/s
- Minimum Sustained Write Speed: 200 MB/s
- Video Performance Guarantee (VPG): 200
- Capacities: 480 GB / 960 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 480 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Delkin Devices BLACK CFexpress Type A 4.0
At: Amazon | B&H Photo | Memory Wolf UK
Angelbird AV PRO CFexpress 2.0 Type A SE
- CFexpress Standard: 2.0
- Max Read Speed: 820 MB/s
- Max Write Speed: 730 MB/s
- Max Sustained Read Speed: 750 MB/s
- Max Sustained Write Speed: 650 MB/s
- Minimum Sustained Write Speed: 200 MB/s
- Video Performance Guarantee (VPG): 200
- Capacities: 160 GB / 330 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 160 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Angelbird AV PRO CFexpress 2.0 Type A SE
At: Amazon | B&H Photo | Memory Wolf UK
Lexar Professional CFexpress Type-A Gold Series
- CFexpress Standard: 2.0
- Max Read Speed: 900 MB/s
- Max Write Speed: 700 MB/s
- Max Sustained Read Speed: xx MB/s
- Max Sustained Write Speed: 400 MB/s
- Minimum Sustained Write Speed: 400 MB/s
- Video Performance Guarantee (VPG): 400
- Capacities: 80 GB / 160 GB / 320 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 160 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
ProGrade Digital CFexpress 4.0 Type A Iridium
- CFexpress Standard: 4.0
- Max Read Speed: 1800 MB/s
- Max Write Speed: 1700 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: 800 MB/s (480 GB) / 1450 MB/s (960 GB)
- Minimum Sustained Write Speed: 200 MB/s
- Video Performance Guarantee (VPG): 200
- Capacities: 480 GB / 960 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 480 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
OWC Atlas Pro CFexpress 4.0 Type A
- CFexpress Standard: 4.0
- Max Read Speed: 1850 MB/s
- Max Write Speed: 1700 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: 400 MB/s
- Minimum Sustained Write Speed: 200 MB/s
- Video Performance Guarantee (VPG): 200
- Capacities: 240 GB / 480 GB / 960 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 240 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Pergear Standard CFexpress Type A
- CFexpress Standard: 2.0
- Max Read Speed: 780 MB/s (256GB) / 800 MB/s (512 GB)
- Max Write Speed: 780 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: NA
- Minimum Sustained Write Speed: NA
- Video Performance Guarantee (VPG): NA
- Capacities: 256 GB / 256 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 256 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Pergear Standard CFexpress Type A
At: Amazon
Angelbird AV PRO CFexpress 4.0 Type A
- CFexpress Standard: 4.0
- Max Read Speed: 1800 MB/s
- Max Write Speed: 1650 MB/s
- Max Sustained Read Speed: 1700 MB/s
- Max Sustained Write Speed: 800 MB/s
- Minimum Sustained Write Speed: 400 MB/s
- Video Performance Guarantee (VPG): 400
- Capacities: 256 GB / 512 GB / 1 TB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 256 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Angelbird AV PRO CFexpress 4.0 Type A
At: Amazon | B&H Photo | Memory Wolf UK
Sony CEA-G Tough CFexpress Type-A
- CFexpress Standard: 2.0
- Max Read Speed: 800 MB/s
- Max Write Speed: 700 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: NA
- Minimum Sustained Write Speed: 400 MB/s
- Video Performance Guarantee (VPG): 400
- Capacities: 80 GB / 160 GB / 320 GB / 640 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 80 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Lexar Professional CFexpress Type A Silver Series
- CFexpress Standard: 2.0
- Max Read Speed: 800 MB/s
- Max Write Speed: 700 MB/s
- Max Sustained Read Speed: NA MB/s
- Max Sustained Write Speed: 600 MB/s
- Minimum Sustained Write Speed: 200 MB/s
- Video Performance Guarantee (VPG): 200
- Capacities: 160 GB / 320 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 260 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Lexar Professional CFexpress Type A Silver Series
At: Amazon | B&H Photo
Delkin Devices BLACK CFexpress Type-A
- CFexpress Standard: 2.0
- Max Read Speed: 880 MB/s
- Max Write Speed: 790 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: NA
- Minimum Sustained Write Speed: 400 MB/s
- Video Performance Guarantee (VPG): 400
- Capacities: 80 GB / 160 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 160 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Delkin Devices BLACK 2.0 CFexpress Type-A
At: Memory Wolf UK
Delkin Devices POWER CFexpress Type-A
- CFexpress Standard: 2.0
- Max Read Speed: 880 MB/s
- Max Write Speed: 790 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: NA
- Minimum Sustained Write Speed: 400 MB/s
- Video Performance Guarantee (VPG): 400
- Capacities: 80 GB / 160 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 80 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Delkin Devices POWER CFexpress Type-A 2.0
At: Amazon | B&H Photo | Memory Wolf UK
ProGrade Digital CFexpress Type-A Cobalt
- CFexpress Standard: 2.0
- Max Read Speed: 800 MB/s
- Max Write Speed: 700 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: NA
- Minimum Sustained Write Speed: 400 MB/s
- Video Performance Guarantee (VPG): 400
- Capacities: 160 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 160 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Sony CEA-M Tough CFexpress Type A
- CFexpress Standard: 2.0
- Max Read Speed: 800 MB/s
- Max Write Speed: 700 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: NA
- Minimum Sustained Write Speed: 200 MB/s
- Video Performance Guarantee (VPG): 200
- Capacities: 960 GB / 1920 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 960 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
ProGrade Digital CFexpress 2.0 Type A Gold
- CFexpress Standard: 2.0
- Max Read Speed: 900 MB/s
- Max Write Speed: 800 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: 450 MB/s (120 GB) / 600 MB/s (240GB/480GB/960GB)
- Minimum Sustained Write Speed: 200 MB/s
- Video Performance Guarantee (VPG): 200
- Capacities: 120 GB / 240 GB / 480 GB / 960 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 120 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Exascend Essential CFexpress Type-A
- CFexpress Standard: 2.0
- Max Read Speed: 800 MB/s
- Max Write Speed: 700 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: NA
- Minimum Sustained Write Speed: 200 MB/s
- Video Performance Guarantee (VPG): 200
- Capacities: 120 GB / 180 GB / 240 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 240 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Pergear Prime CFexpress Type A
- CFexpress Standard: 2.0
- Max Read Speed: 800 MB/s (80GB / 1TB) / 880 MB/s (260GB / 520GB)
- Max Write Speed: 600 MB/s (80GB) / 400 MB/s (260GB / 520GB) / 700 MB/s (1 TB)
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: NA
- Minimum Sustained Write Speed: NA
- Video Performance Guarantee (VPG): NA
- Capacities: 80 GB / 260 GB / 520 GB / 1 TB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 260 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Pergear Prime CFexpress Type A
At: Amazon
Pergear Master 4.0 CFexpress Type A
- CFexpress Standard: 4.0
- Max Read Speed: 1780 MB/s
- Max Write Speed: 1600 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: 700 MB/s
- Minimum Sustained Write Speed:
- Video Performance Guarantee (VPG):
- Capacities: 256 GB / 512 GB / 1 TB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 256 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Pergear Master 4.0 CFexpress Type A
At: Amazon
Novachips Express 4.0 CFexpress Type A
- CFexpress Standard: 4.0
- Max Read Speed: 1600 MB/s
- Max Write Speed: 1200 MB/s (800GB), 1300 MB/s (1.6TB)
- Max Sustained Read Speed: 1600 MB/s
- Max Sustained Write Speed: 1200 MB/s (800GB), 1300 MB/s (1.6TB)
- Minimum Sustained Write Speed:
- Video Performance Guarantee (VPG): 400
- Capacities: 800 GB / 1.6 TB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 1.6 TB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | Over 500 | < 2.00s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Novachips Express 4.0 CFexpress Type A
At: Amazon | Memory Wolf UK
Nextorage NX-A1SE CFexpress Type A
- CFexpress Standard: 2.0
- Max Read Speed: 950 MB/s
- Max Write Speed: 950 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: NA
- Minimum Sustained Write Speed: 400 MB/s
- Video Performance Guarantee (VPG): 200
- Capacities: 480 GB / 960 GB / 1920 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 480 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 208 | 2.33s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Nextorage NX-A1SE CFexpress Type A
At: Amazon | Memory Wolf UK
Nextorage NX-A2SE CFexpress Type A
- CFexpress Standard: 4.0
- Max Read Speed: 1900 MB/s
- Max Write Speed: 1700 MB/s
- Max Sustained Read Speed: NA
- Max Sustained Write Speed: NA
- Minimum Sustained Write Speed: 400 MB/s (256GB) / 850 MB/s (512GB) / 1500 MB/s (1024GB)
- Video Performance Guarantee (VPG): 200
- Capacities: 256 GB / 512 GB / 1024 GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 256 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 204 | 2.43s |
| Compressed RAW (36.6MB) – 10 fps | Over 500 | < 2.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | Over 500 | < 2.00s |
| JPEG Extra Fine (24MB) – 10 fps | Over 500 | < 2.00s |
Check Price & Reviews: Nextorage NX-A2SE CFexpress Type A
At: Amazon
UHS-II SD Memory Card Buffer Tests
If you don’t shoot many continuous bursts then you don’t really need to purchase CFexpress cards because UHS-II SD cards will be fast enough. The main benefit to the faster CFexpress cards for single shot shooters would be copying files over to your computer faster.
Here are all of the UHS-II SD cards that I have tested in my A7IV so far.
Delkin Devices BLACK V90 UHS-II SDXC
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 250 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB, 512GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.30s |
| Compressed RAW (36.6MB) – 10 fps | 54 | 4.18s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 109 | 2.71s |
| JPEG Extra Fine (24MB) – 10 fps | 132 | 2.61s |
Check Price & Reviews: Delkin Devices BLACK V90 UHS-II SDXC
At: Amazon | B&H Photo | Memory Wolf UK
Sony SF-G Tough UHS-II SDXC
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 299 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.30s |
| Compressed RAW (36.6MB) – 10 fps | 54 | 4.19s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 110 | 2.70s |
| JPEG Extra Fine (24MB) – 10 fps | 132 | 2.61s |
Very Important Note: Old versions of these cards do not work with the A7 IV. I get a message that says: “Unable to use Memory Card. Slot 1″. Sony has a replacement program for older versions of these cards due to VSC mode (Video Speed Class) issues where recorded footage on the card may be damaged or may not be recorded optimally. I have three cards that I never got around to sending back that don’t work at all in the a7 IV, but work fine in all of my other Sony cameras. New cards purchased from the second half of 2020 should not be affected, and my cards purchased this year work fine. You can find out if your cards are affected by checking this article.
Delkin Devices 64GB POWER UHS-II SDXC
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 250 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.30s |
| Compressed RAW (36.6MB) – 10 fps | 54 | 4.18s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 109 | 2.71s |
| JPEG Extra Fine (24MB) – 10 fps | 132 | 2.61s |
SanDisk Extreme Pro UHS-II SDXC (300/300)
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 300 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB, 512GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.30s |
| Compressed RAW (36.6MB) – 10 fps | 54 | 4.19s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 108 | 2.71s |
| JPEG Extra Fine (24MB) – 10 fps | 132 | 2.63s |
OWC Atlas Ultra UHS-II SDXC
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 250 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB, 512GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 128 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.31s |
| Compressed RAW (36.6MB) – 10 fps | 54 | 4.19s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 109 | 2.71s |
| JPEG Extra Fine (24MB) – 10 fps | 132 | 2.61s |
Nextorage NX-F2PRO Series UHS-II SDXC
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 299 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 256 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.31s |
| Compressed RAW (36.6MB) – 10 fps | 54 | 4.19s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 109 | 2.71s |
| JPEG Extra Fine (24MB) – 10 fps | 132 | 2.61s |
Lexar Professional 2000X UHS-II
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 260 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.32s |
| Compressed RAW (36.6MB) – 10 fps | 54 | 4.18s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 109 | 2.73s |
| JPEG Extra Fine (24MB) – 10 fps | 130 | 2.64s |
Kingston Canvas React Plus UHS-II SDXC
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 290 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.40s |
| Compressed RAW (36.6MB) – 10 fps | 52 | 4.45 |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 105 | 2.56s |
| JPEG Extra Fine (24MB) – 10 fps | 130 | 2.67s |
ProGrade V90 UHS-II
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 250 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.45s |
| Compressed RAW (36.6MB) – 10 fps | 46 | 4.41s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 73 | 2.88s |
| JPEG Extra Fine (24MB) – 10 fps | 85 | 2.63s |
Integral UltimaPro X2 UHS-II SDXC
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 280 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB, 512GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.48s |
| Compressed RAW (36.6MB) – 10 fps | 54 | 4.23s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 109 | 2.76s |
| JPEG Extra Fine (24MB) – 10 fps | 132 | 2.69s |
Check Price & Reviews: Integral UltimaPro X2 UHS-II SDXC
At: Amazon
PNY X-PRO 90 UHS-II SDXC
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 280 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.49s |
| Compressed RAW (36.6MB) – 10 fps | 52 | 4.45 |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 105 | 2.75s |
| JPEG Extra Fine (24MB) – 10 fps | 130 | 2.68s |
Exascend Catalyst UHS-II SDXC
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 280 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 128 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.60s |
| Compressed RAW (36.6MB) – 10 fps | 52 | 4.45 |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 105 | 2.56s |
| JPEG Extra Fine (24MB) – 10 fps | 130 | 2.67s |
Angelbird AV Pro Mk 2 V90
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 280 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.65s |
| Compressed RAW (36.6MB) – 10 fps | 45 | 4.13s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 73 | 2.75s |
| JPEG Extra Fine (24MB) – 10 fps | 86 | 2.56s |
Transcend SD 700S UHS-II
- Bus Type: UHS-II
- Maximum Read Speed: 285 MB/s
- Maximum Write Speed: 180 MB/s
- Minimum Write Speed: 90 MB/s
- Video Rating: V90
- Capacities: 32GB, 64GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 23 | 4.65 |
| Compressed RAW (36.6MB) – 10 fps | 28 | 4.11 |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 15 | 2.81s |
| JPEG Extra Fine (24MB) – 10 fps | 25 | 5.70s |
Nextorage NX-F2SE Series UHS-II SDXC
- Bus Type: UHS-II
- Maximum Read Speed: 280 MB/s
- Maximum Write Speed: 170 MB/s
- Minimum Write Speed: 60 MB/s
- Video Rating: V60
- Capacities: 64GB, 128GB, 256GB, 512GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 512 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 20 | 5.45s |
| Compressed RAW (36.6MB) – 10 fps | 40 | 5.28s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 32 | 3.40s |
| JPEG Extra Fine (24MB) – 10 fps | 48 | 3.58s |
Sony SF-M Tough UHS-II
- Bus Type: UHS-II
- Maximum Read Speed: 277 MB/s
- Maximum Write Speed: 150 MB/s
- Minimum Write Speed: 60 MB/s
- Video Rating: V60
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 17 | 6.81s |
| Compressed RAW (36.6MB) – 10 fps | 35 | 6.09s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 25 | 3.71s |
| JPEG Extra Fine (24MB) – 10 fps | 38 | 3.96s |
Very Important Note: Old versions of these cards do not work with the A7 IV. I get a message that says: “Unable to use Memory Card. Slot 1″. Sony has a replacement program for older versions of these cards due to VSC mode (Video Speed Class) issues where recorded footage on the card may be damaged or may not be recorded optimally. I have three cards that I never got around to sending back that don’t work at all in the A7 IV, but work fine in all of my other Sony cameras. New cards purchased from the second half of 2020 should not be affected, and my cards purchased this year work fine. You can find out if your cards are affected by checking this article.
Sony SF-M UHS-II
- Bus Type: UHS-II
- Maximum Read Speed: 277 MB/s
- Maximum Write Speed: 150 MB/s
- Minimum Write Speed: 60 MB/s
- Video Rating: V60
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 17 | 6.81s |
| Compressed RAW (36.6MB) – 10 fps | 35 | 6.09s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 25 | 3.71s |
| JPEG Extra Fine (24MB) – 10 fps | 38 | 3.96s |
Very Important Note: Old versions of these cards do not work with the A7 IV. I get a message that says: “Unable to use Memory Card. Slot 1″. Sony has a replacement program for older versions of these cards due to VSC mode (Video Speed Class) issues where recorded footage on the card may be damaged or may not be recorded optimally. I have three cards that I never got around to sending back that don’t work at all in the A7 IV, but work fine in all of my other Sony cameras. New cards purchased from the second half of 2020 should not be affected, and my cards purchased this year work fine. You can find out if your cards are affected by checking this article.
ProGrade V60 UHS-II
- Bus Type: UHS-II
- Maximum Read Speed: 250 MB/s
- Maximum Write Speed: 130 MB/s
- Minimum Write Speed: 60 MB/s
- Video Rating: V60
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 17 | 7.13s |
| Compressed RAW (36.6MB) – 10 fps | 33 | 6.85s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 24 | 3.91s |
| JPEG Extra Fine (24MB) – 10 fps | 35 | 4.24s |
Angelbird AV Pro MK2 V60 UHS-II SDXC
- Bus Type: UHS-II
- Maximum Read Speed: 300 MB/s
- Maximum Write Speed: 280 MB/s
- Minimum Write Speed: 60 MB/s
- Video Rating: V60
- Capacities: 64GB, 128GB, 256GB, 512GB, 1TB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 15 | 10.15s |
| Compressed RAW (36.6MB) – 10 fps | 30 | 9.28s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 17 | 5.83 |
| JPEG Extra Fine (24MB) – 10 fps | 28 | 6.01s |
Sony SF-E UHS-II
- Bus Type: UHS-II
- Maximum Read Speed: 270 MB/s
- Maximum Write Speed: 70 MB/s (64GB), 120 MB/S (128GB/256GB)
- Minimum Write Speed: 30 MB/s
- Video Rating: V30
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 15 | 13.03s |
| Compressed RAW (36.6MB) – 10 fps | 27 | 12.00s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 17 | 8.25s |
| JPEG Extra Fine (24MB) – 10 fps | 26 | 7.98s |
Lexar Professional 1667X UHS-II
- Bus Type: UHS-II
- Maximum Read Speed: 250 MB/s
- Maximum Write Speed: 120 MB/s
- Minimum Write Speed: 60 MB/s
- Video Rating: V60
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 15 | 14.01s |
| Compressed RAW (36.6MB) – 10 fps | 27 | 8.95s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 17 | 5.91s |
| JPEG Extra Fine (24MB) – 10 fps | 25 | 5.66s |
Best UHS-I Memory Cards
The A7IV does also support the slower UHS-I memory cards. So if you are not shooting a lot of continuous bursts and filling the buffer quickly, you can save a few extra dollars by purchasing these cheaper cards instead.
Delkin Devices Advantage SDXC UHS-I
- Bus Type: UHS-I
- Maximum Read Speed: 80 MB/s
- Maximum Write Speed: 100 MB/s
- Minimum Write Speed: 30 MB/s
- Video Rating: V30
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 15 | 11.38s |
| Compressed RAW (36.6MB) – 10 fps | 28 | 11.20s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 17 | 7.90s |
| JPEG Extra Fine (24MB) – 10 fps | 27 | 7.25s |
SanDisk Extreme Pro UHS-I
- Bus Type: UHS-I
- Maximum Read Speed: 170 MB/s
- Maximum Write Speed: 90 MB/s
- Minimum Write Speed: 30 MB/s
- Video Rating: V30
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 15 | 14.25s |
| Compressed RAW (36.6MB) – 10 fps | 27 | 13.45s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 16 | 8.90s |
| JPEG Extra Fine (24MB) – 10 fps | 26 | 9.18s |
SanDisk Extreme UHS-I
- Bus Type: UHS-I
- Maximum Read Speed: 150 MB/s
- Maximum Write Speed: 70 MB/s
- Minimum Write Speed: 30 MB/s
- Video Rating: V30
- Capacities: 64GB, 128GB, 256GB
In-Camera Speed & Buffer Test Results
Here are my in-camera speed test results using a 64 GB card:
Drive Mode Hi+ (Max 10fps)
Please note that the maximum speed of 10 fps is only possible in compressed RAW, JPEG and HEIF file formats.
| Image Type | Shots Before Hitting Buffer | Time to Clear Buffer (Seconds) |
|---|---|---|
| Uncompressed RAW (70.3MB) – 6 fps | 15 | 15.66s |
| Compressed RAW (36.6MB) – 10 fps | 26 | 13.55s |
| Lossless Compressed RAW L (40.5MB) – 6 fps | 16 | 8.98s |
| JPEG Extra Fine (24MB) – 10 fps | 25 | 9.71s |
Memory Card Readers
If you decide to purchase a CFexpress Type-A card or a UHS-II card, then you will also need a compatible memory card reader unless you connect your A7 IV directly to your computer. Here are some of the options available.
ProGrade Digital CFexpress Type A USB 4.0 Single-Slot Card Reader
The CFexpress Type A USB 4.0 Single Slot-Card Reader from ProGrade Digital features a single CFexpress 4.0 Type A slot that supports up to 40 GBits per second (5 GB/s). A magnetic base can be used to secure the reader to your Windows or Mac system. A 2.6′ USB 4.0 cable is included.
Sony MRW-G2 CFExpress Type-A Card Reader
The Sony MRW-G2 supports both CFexpress Type A cards as well as a SD/SDHC/SDXC cards, along with transfer speeds of up to 10 Gb/s via USB 3.1 Gen 2. Both USB Type-C to Type-C and USB Type-C to Type-A cables are included.
ProGrade Digital CFexpress Type A & UHS-II SDXC Dual-Slot USB 3.2 Gen 2 Card Reader
The ProGrade Digital reader has basically the same specs as the Sony MRW-G2 reader but comes at a cheaper price. It has one CFexpress Type A slot and one UHS-II SDXC slot, and also support up to 10 Gb/s via USB 3.2 Gen 2 to deliver transfer speeds of up to 1.25 GB/s, or 1250 MB/s via its USB Type-C interface. It includes USB Type-C to Type-C and Type-C to Type-A cables.
Sony MRW-S1 UHS-II USB Memory Card Reader/Writer
The Sony MRW-S1 UHS-II USB SD Card Reader/Writer can read/write to UHS-II SD Cards via a USB 3.1 interface and is backward compatible with UHS-I SD cards. The Sony MRW-S1 used together with Sony SF-G cards will transfer files to and from your computer around 2.6x faster than UHS-I SD cards.
Kingston MobileLite Plus USB 3.2 SDHC/SDXC UHS-II Card Reader (MLP)
This UHS-II SD card reader features a fast USB 3.2 Gen 1 interface and supports both UHS-II and UHS-I cards.
Memory Cards for Recording Video
The Sony A7IV supports a number of different movie recording formats. The format that you choose to record in will determine the memory cards that you use. Here’s a list or supported recording formats and compatible memory cards for the A7IV.
Memory Cards for S&Q Motion Shooting
Here you can find a list of supported recording formats and compatible memory cards for S&Q motion shooting with the A7IV.
You will only require a CFexpress Type-A card when shooting in S&Q Mode with the file format set to XAVC S-I 4k, a record frame rate of 25p and a frame rate of 50fps (2x slow motion).
*1 When [Rec Frame Rate] is set to [30p]/[25p]/[24p], [Frame Rate] is set to [120fps]/[100fps], and the recordable bit rate is set to 50 Mbps, an SDXC card (V60 or higher) or a CFexpress Type A memory card (VPG200 or higher) is required.
*2 When [Rec Frame Rate] is set to [30p]/[25p]/[24p] and [Frame Rate] is set to [60fps]/[50fps] for slow-motion recording, a CFexpress Type A memory card (VPG200 or higher) is required.
What Size Memory Card Do You Need?
If you will be shooting a lot of continuous bursts then you will probably want to use at least a 160GB CFexpress card.
If you are not shooting long continuous bursts then you’ll probably be fine with 32GB or 64GB cards and you certainly won’t need the faster CFexpress Type A cards.
For shooting video the size of memory card will depend largely on the format that you are recording in. Or you may be using an external recorder anyway so this won’t be so important.
I’d recommend only using SDXC cards and not SDHC. 32GB cards and smaller are SDHC and use the FAT32 file system. If you shoot video with a SDHC card your files will be split into 4GB chunks which creates extra work in post production.
The following tables will help you to better understand what size cards you need.
How Many Images Can Be Recorded on a Memory Card?
The table below shows the approximate number of images that can be recorded on a memory card formatted in the A7IV when using a Sony memory card with the aspect ratio set to 3:2 and JPEG/HEIF size set to L:33M.
The values may vary depending on the shooting conditions and the type of memory card used.
Movie Record Times
The table below shows the approximate total recording times using a Sony memory card formatted in the Sony A7IV. The values may vary depending on the shooting conditions and the type of memory card used.
Simultaneous Recording Slot 1 + Slot 2
If you want to record simultaneously to both slots 1 and 2 at the same time then there is no benefit to using a CFexpress Type-A memory card in slot 1.
With this setup the write speed is restricted to the maximum write speed of the UHS-II card in slot 2. So if you shoot like this often you can save money by using UHS-II cards in slot 1 instead of CFexpress Type-A.
The only benefit to using a CFexpress Type-A card when shooting simultaneously is to enjoy the faster read times when copying the files to your computer.
Providing you are using identical UHS-II cards in both slots then the number of shots that you can take and the buffer clearing time will be the same as writing to a single slot. If one of the UHS-II cards is slower then you will be limited to the speed of that card.
Sort RAW / JPEG
You can also setup your A7 IV to record RAW files to slot 1 and JPEG files to slot 2. With this setup there is still a benefit to using a CFexpress card in slot 1.
Dual Card Setup Guide
If you are not sure how to setup dual card recording with the Sony A7 IV then you might find my short video guide helpful.
Summary
If you shoot a lot of continuous bursts and want the buffer to clear as fast as possible, then you’ll want to use a CFexpress Type-A card in slot one.
All of the CFexpress Type-A cards that I’ve tested perform very well in-camera. You can comfortably shoot 500+ uncompressed RAW images without hitting the buffer.
This is because the A7IV only writes at around 420 MB/s when shooting uncompressed RAW images, so none of the CFexpress Type A cards tested here will struggle.
To see these cards tested a little harder please visit my Sony A1 Memory Card Guide where they will reveal their weaknesses.
All of the V90 rated UHS-II SDXC cards perform very well, but unlike the CFexpress Type A cards you will hit the buffer after around 23 uncompressed RAW images. The buffer will clear in around 4-5 seconds.
The Angelbird AV Pro Mk 2 V90 and Transcend SD 700S UHS-II both perform well when shooting in uncompressed RAW format, but they slow down dramatically when shooting in the other image formats, I’d recommend avoiding these cards.
If you want to shoot in S&Q Mode with the file format XAVC S-I 4k, a record frame rate of 25p/30p and a frame rate of 50fps /60fps then you will need a CFexpress Type A card. The A7 IV will not let you record in this specific format with a V90 card.
Alternatively you could record in one of the none S&Q video formats such as 4k60 XAVCS and then interpret the footage in post. Of course you won’t be able to view the S&Q footage in camera and this is an extra post processing step, but now you won’t require a CFexpress card and you’ll also get audio since recording in S&Q disables the audio.
It would be good to hear about what cards you are using in your own A7 IV and whether or not you have run into any problems with them. Please let me know in the comments below.
Table of Contents[Hide][Show]
- Which Cards to Buy?
- Quick In-Camera Card Speed Comparison
- Which Memory Cards are Supported?
CFexpress Type-A Memory Card Buffer Tests+−
- Nextorage NX-A1PRO CFexpress Type A
- Delkin Devices BLACK CFexpress Type A 4.0
- Angelbird AV PRO CFexpress 2.0 Type A SE
- Lexar Professional CFexpress Type-A Gold Series
- ProGrade Digital CFexpress 4.0 Type A Iridium
- OWC Atlas Pro CFexpress 4.0 Type A
- Pergear Standard CFexpress Type A
- Angelbird AV PRO CFexpress 4.0 Type A
- Sony CEA-G Tough CFexpress Type-A
- Lexar Professional CFexpress Type A Silver Series
- Delkin Devices BLACK CFexpress Type-A
- Delkin Devices POWER CFexpress Type-A
- ProGrade Digital CFexpress Type-A Cobalt
- Sony CEA-M Tough CFexpress Type A
- ProGrade Digital CFexpress 2.0 Type A Gold
- Exascend Essential CFexpress Type-A
- Pergear Prime CFexpress Type A
- Pergear Master 4.0 CFexpress Type A
- Novachips Express 4.0 CFexpress Type A
- Nextorage NX-A1SE CFexpress Type A
- Nextorage NX-A2SE CFexpress Type A
UHS-II SD Memory Card Buffer Tests+−
- Delkin Devices BLACK V90 UHS-II SDXC
- Sony SF-G Tough UHS-II SDXC
- Delkin Devices 64GB POWER UHS-II SDXC
- SanDisk Extreme Pro UHS-II SDXC (300/300)
- OWC Atlas Ultra UHS-II SDXC
- Nextorage NX-F2PRO Series UHS-II SDXC
- Lexar Professional 2000X UHS-II
- Kingston Canvas React Plus UHS-II SDXC
- ProGrade V90 UHS-II
- Integral UltimaPro X2 UHS-II SDXC
- PNY X-PRO 90 UHS-II SDXC
- Exascend Catalyst UHS-II SDXC
- Angelbird AV Pro Mk 2 V90
- Transcend SD 700S UHS-II
- Nextorage NX-F2SE Series UHS-II SDXC
- Sony SF-M Tough UHS-II
- Sony SF-M UHS-II
- ProGrade V60 UHS-II
- Angelbird AV Pro MK2 V60 UHS-II SDXC
- Sony SF-E UHS-II
- Lexar Professional 1667X UHS-II
- Memory Cards for Recording Video
- Memory Cards for S&Q Motion Shooting
- What Size Memory Card Do You Need?
- How Many Images Can Be Recorded on a Memory Card?
- Movie Record Times
- Simultaneous Recording Slot 1 + Slot 2
- Sort RAW / JPEG
- Dual Card Setup Guide
- Summary
- FAQs
- Sony A7 IV Guides & Resources
FAQs
The Sony A7IV supports CFexpress Type A memory cards in slot 1 only. UHS-I and UHS-II SD cards are also supported in both slot 1 and slot 2.
Sony A7 IV Forum & Facebook Group
If you are looking for further help and advice on the a7 IV or would simply like to share your photos and videos, then please head over to our friendly full-frame Forum. If you prefer Facebook then we also run the Sony A7 IV Shooters Group.
Excellent review!
Hey,
Mind Testing using a CFexpress A and a V90 card together? Shooting Raw to one and Jpg to the other (Can you shoot compressed raw to the one and full to the other? if so that too please)
I just want to see how resonable it is to shoot Raw+ Jpg if I’m doing something I need a long burst for (Honestly, I’ve never even hit the buffer on my A7iii using v30 cards, but would still be nice to know in the mean time)
Hi William. I have already tested this type of setup.
If you use a CFexpress Type-A card in slot 1 then providing you record either uncompressed or compressed raw to slot 1 and JPEGs to slot 2, you will never hit the buffer when shooting continuously. However, you must be using one of the faster UHS-II cards in slot 2 like the Kingston Canvas React Plus UHS-II or Sony SF-G Tough cards. Slower cards like the Sony SF-M cards will cause the buffer to be hit.
If you use UHS-II cards in both slots and want to shoot uncompressed or compressed raw to slot 1 and JPEGs to slot 2 you will hit the buffer after around 26 shots (uncompressed raw) or 67 shots (compressed raw).
Hope that helps!
Hi Timothy
Fantastic information here, thanks so much!
But my experience does differ a little for this set up. I do hit the buffer when recording compressed raw to a Pergear Professional CFexpress Type A 520GB card in slot 1, plus JPEG extra fine to a Kingston Canvas React Plus v90 card in slot 2. The camera then drops from 10 frames per second to around 6 frames per second. If I drop from JPEG extra fine to JPEG fine in slot 2, but still 33MP, then I never hit the buffer.
If I only use slot 1 without slot 2 then I never hit the buffer recording compressed raw to to Pergear card, and also never hit the buffer recording JPEG extra fine to the Kingston card, so I guess it’s camera processing rather than write speed causing this?
I can confirm that I am using a Pergear Professional (Prime) card as you did, not a Pergear Standard card.
Hi Timothy,
great comparison! May I ask how you tested all that? Your measurements are very detailed, so I’m wondering about your test procedure. I searched in the text, but couldn’t find it.
I was thinking about doing a test for the ones I bought, particularly my Sony tough cards, which seem to have an issue (at least they do on the computer and they also seem to lag at times). My approach would be filming with a smartphone at high fps and then analyzing in premiere pro.
Any input would be greatly appreciated. Thank you!
Hi Wolfgang. I’m glad that you liked the comparison. The tests are quite simple. I shoot the same test scene (a book cover) that provides enough detail to simulate a typical shot, this is more important for the compressed file types than uncompressed. I fire off a burst of shots before starting the test because for some reason the first write is often much slower than subsequent writes for many of the cards I’ve tested.
I then press the shutter button and time how long it takes before the buffer is full. I also time how long it takes for the buffer to clear. I repeat this test until I get 3 results with the identical number of shots taken. I then average the buffer clearing time and total time of these results. I calculate the average in-camera write speed by taking the number of shots, multiplying this by the file size then dividing by the total time taken to shoot and clear the buffer.
There was a recall for some of the older Sony Tough cards that had issues. Further details here: https://www.alphashooters.com/sony-memory-card-replacement-program-june-2020/
Thanks Timothy for great contest and all your efforts for this website.
I’m wondering how the Kodak UHS-II v90 performs comp[are to other brands you tested.
If you can add that test results for that which has resonably priced for a V90 memory that would be awesome!
Thanks Ehsan. I’ve not tested the Kodak UHS-II v90 so can’t comment on its performance I’m afraid. I will look into adding it to my future tests though.
Has anyone experienced significant lag when trying to review photos on uhs-ii cards? I purchased a used a7iv that works perfectly, except for a 3-6 seconds lag when trying to review pictures as well as switching back to photo mode from preview mode. I’m wondering if I was sold a lemon.
Did you resolve this Jesse? Try changing your Auto Review settings. MENU → (Setup) → [Display Option] → [Auto Review] → desired setting. Personally I prefer it turned off.
Hi Timothy, great article. I was wondering if the write speed of the SD/Cfe-A cards slows down once the card is filling up. That is something that is often observed with SSDs in computers. Basically, is the write speed still the same for a card at e.g. 80% vs 0% storage capacity?
Given the current prices, many will be inclinded to go for a smaller/cheaper card. However, if that comes with a drop in burst rate duration, it might be important to factor that into the purchasing decision. For instance, sport events like cycling often require the sustained burst rate for the finish line shots at the end of the race, when the SD card is likely not empty anymore. Curious to hear what you think. Best, Matt
Not that I’ve seen Matt although I have not testes this extensively. Thankfully the price of CFexpress Type-A cards is coming down slowly as more manufacturers enter this space.
Hi Timothy, thanks so much for all your tests. Quick question about the buffer clearance. On my old a7RM2, the camera is completely ‘locked’ while the buffer is clearing. Can you please confirm that on the a7M4 one can a) acess the menu (e.g. changing the focus mode) while the buffer is clearing and b) start taking new pictures while the buffer is still clearing? For instance, it might take ~6 sec for the buffer to clear completely. I wonder if it’s possible to start shooting after 3 sec already; at that point the buffer is not cleared entirely, but should already have capacity for new images. Or does one have to wait until the buffer is cleared completely before taking new images? Appreciate your help, Matt
Hi Matt. Yes you can shoot whilst the buffer is clearing but obviously only until the buffer is full again.
Thank you for the great article – very helpful!
By any chance, have you done any tests to see if the SD/CFe write speeds slow down once the card is getting 50%, 70%, 90% full? Or any guess maybe, given that this behavior is also seen with normal SSDs?
People using the camera for sporting events, or bursts in general, might be surprised if the buffer capacity is is all of a sudden deminished in the later stages of a sport event (when the card storage is nearly full).
I am asking, because that might actually impact my decision to opt for a card with more storage, despite the price penalty.
Curious what you think,
Matt
Hi Matt. Sorry I’ve only just seen this comment. I’ve not done any extensive testing here but it a quick test I didn’t notice the frame rate slowing down as the card neared its full capacity.
Hi Timothy,
thank you so much for this test!
I have a question about the card slot write speeds… Sony says, that both slots support UHS-II but when I shoot on the second slot I can shoot way longer (like you tested) in burst mode and if I shoot on the first slot, it seems like it only has the speed off an UHS-I card… Is there an issue with my camera/SD Card or can you confirm this?
I use a SanDisk Extreme Pro 32GB SDHC II 300MB/s
best regards Darius
Hi Darius. Providing you are using the same card (as you are) and also have the camera setup to record the same image type to slot 1 or slot 2, then there really is no reason why one slot would be slower than the other. If you had it setup to record say uncompressed RAW images to slot 1 but JPEGS to slot 2 then you would see a big difference in the time taken to clear the buffer.
Ok thanks 🙂 than my camera seems to be a case for Sony guarantee 🙁
Hi, I just newly brought the Sony A7iv i want to know that can I use CF EXPRESS TYPE A card in both slot? I use this camera for videos mostly plz let me know thanks
Hi Badir. Only slot 1 supports CFexpress Type-A cards I’m afraid. You’ll need to use an SD card in slot 2, something like the Kingston Canvas React Plus UHS-II card.