The EOS R features a new lens mount that has the same 54mm inner diameter as the Canon EF-mount, but a shorter flange back distance of 20mm. Along with the new camera they also announced 4 new lenses: an RF 24-105mm F4L IS lens, an RF 50mm F1.2L, an RF 28-70mm F2L lens, and an RF 35mm F1.8 IS Macro.
Canon have kept everything regarding the EOS R under wraps until launch day, even the press didn’t seem to have been given the normal heads-up. Or it may be that Nikon’s recent launch of the Z6 (Z6 vs a7 III) and the Z7 (Z7 vs a7R III) forced Canon to announce the EOS R a little sooner than planned.
But we do now know the official specs, so here’s a quick spec comparison between the Sony a7III and the Canon EOS R. I will be expanding on this article over the next 24 hours as I learn more about the EOS R.
Sony a7III vs Canon EOS R Comparison
|Lens Mount||Sony a7 III||Canon EOS R|
|Lens Mount Type||Sony E-mount||Canon RF-mount|
|Lens Mount Diameter||46.1mm||54mm|
|Sensor||Sony a7 III||Canon EOS R|
|Sensor Type||BSI-CMOS||Dual Pixel CMOS|
|Sensor Size||Full Frame (35mm)||Full Frame (36 x 24mm)|
|Low Pass Optical Filter (anti-aliasing)||Yes||Yes|
|Resolution||24.2 Megapixels||30 Megapixels|
|Processor||Bionz X||DIGIC 8|
|ISO||Native: 100-51200 Expanded: 50-204800||Native: 100-40000 Expanded: 50-102400|
|Dynamic Range||EV -3 (with f/2.0 lens) – EV +20||EV -6 (with f/1.2 lens) – EV +18|
|Image||Sony a7 III||Canon EOS R|
|Image Ratio||3:2, 16:9||1:1, 4:3, 3:2, 16:9|
|Color Space||sRGB, Adobe RGB||sRGB, Adobe RGB|
|Shutter||Sony a7 III||Canon EOS R|
|Electronic Shutter Speed||Min 30sec + bulb, Max 1/8000sec||Min 30sec + bulb, Max 1/8000sec|
|Mechanical Shutter Speed||Min 30sec + bulb, Max 1/8000sec||Min 30sec + bulb, Max 1/8000sec|
|Flash Sync Speed||1/250 sec||1/200 sec|
|Autofocus||Sony a7 III||Canon EOS R|
|Autofocus Points||693 Phase + 425 Contrast||5655|
|Continuous Shooting||Sony a7 III||Canon EOS R|
|Max Frames Per Second (FPS)||10 FPS||8 FPS (Max. 5fps with AF Tracking)|
|Buffer Size||177 JPEG, 89 compressed RAW, 40 RAW||100 JPEG, 78 compressed RAW, 47 RAW|
|LCD Display||Sony a7 III||Canon EOS R|
|Resolution||921,600 dots||2.1 million dots|
|Touch Screen||Yes (only to focus)||Yes|
|EVF Display||Sony a7 III||Canon EOS R|
|Resolution||2.36 million dots (OLED)||3.69 million dots (OLED)|
|Top Display||Sony a7 III||Canon EOS R|
|Video||Sony a7 III||Canon EOS R|
|Resolution||3840 x 2160 @ 30p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM
3840 x 2160 @ 24p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM
3840 x 2160 @ 30p / 60 Mbps, XAVC S, MP4, H.264, Linear PCM
3840 x 2160 @ 24p / 60 Mbps, XAVC S, MP4, H.264, Linear PCM
1920 x 1080 @ 120p / 100 Mbps, XAVC S, MP4, H.264, Linear PCM
1920 x 1080 @ 120p / 60 Mbps, XAVC S, MP4, H.264, Linear PCM
1920 x 1080 @ 60p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM
1920 x 1080 @ 30p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM
1920 x 1080 @ 24p / 50 Mbps, XAVC S, MP4, H.264, Linear PCM
1920 x 1080 @ 60p / 25 Mbps, XAVC S, MP4, H.264, Linear PCM
1920 x 1080 @ 30p / 16 Mbps, XAVC S, MP4, H.264, Linear PCM
1920 x 1080 @ 60i / 24 Mbps, AVCHD, MTS, H.264, Linear PCM
1920 x 1080 @ 60i / 17 Mbps, AVCHD, MTS, H.264, Linear PCM
4K (16:9) 3840 x 2160 (29.97, 25, 24, 23.98 fps) intra or inter frame
Full HD (16:9) 1920 x 1080 (59.94, 50, 29.97, 25, 23.98 fps) intra or inter frame
Full HD (16:9) 1920 x 1080 HDR (29.97, 25 fps) inter frame
Full HD (16:9) 1920 x 1080 (29.97, 25) light inter frame
HD (16:9) 1280 x 720 (119.9, 100 fps) intra frame
|Format||MPEG-4, AVCHD, XAVC S, H.264||MP4 Video: 4K (16:9) 3840 x 2160, Full HD, HD
MPEG4 AVC/H.264 variable (average) bit rate, Audio: Linear PCM
|HDMI Output||8-bit 4:2:2||10-bit 4:2:2|
|Max Single Recording Time||29 minutes 59 seconds||29 minutes 59 seconds|
|Picture Profiles||S-Log2 and S-Log3, and HLG||Canon Log 1|
|Storage||Sony a7 III||Canon EOS R|
|Storage Type||SD Card||SD Card|
|Memory Card Slots||2 (Slot 1: UHS-II/I, Slot 2: UHS-I)||1 (UHS-II/I)|
|Battery||Sony a7 III||Canon EOS R|
|Battery Model||Sony NP-FZ100 (2280 mAh)||Canon LP-E6N (1865 mAh)|
|Still Images||Official: 710 shots (using LCD screen), Unofficial: Closer to 2000 shots||Official: 370 shots|
|Video||210 minutes (using LCD screen)||N/A|
|Charger Included in Box||No (USB Only)||Yes (Canon LC-E6E)|
|Other Features||Sony a7 III||Canon EOS R|
|Eye Autofocus||Yes with continuous focus||Yes with single focus|
|Connectivity||Sony a7 III||Canon EOS R|
|GPS||Via Smartphone App||Requires GP-E2 GPS Receiver|
|USB||Yes, USB Type-C||Yes, USB Type-C|
|Flash Sync Port||No||N/A|
|Physical||Sony a7 III||Canon EOS R|
|Depth||73.7mm, 62.7 mm (from grip to monitor)||84.4mm|
|Weight||650g (with card and battery)||660g (with card and battery)|
|Weather Resistance||Dust and Moisture||Water and Dust|
|Price||Sony a7 III||Canon EOS R|
|Body Only||$1,998.00 / £1,999.00||$2,299.00 / £2,349.00|
|With Kit Lens||$2,198.00 / £2,199.00 (w/28-70 F3.5-5.6 lens)||$3,399.00 / £3,269.00 (RF 24-105mm F4 L IS USM lens)|
Sony a7III vs Canon EOS R Summary
Unlike the Nikon Z6 and Z7, the Canon EOS R doesn’t appear to have been given to any press or YouTubers before it’s official launch. Considering the negativity that the pre-production version of the Z6 and Z7 received, this is probably a sensible move from Canon. However, it does leave us with the only option of comparing the spec sheet between the two cameras, which also isn’t ideal.
That said, here’s what I see.
The Canon EOS R is clearly competing directly with the Sony a7III and the Nikon Z6. It brings with it the new Canon RF-Mount and 4 new RF lenses at launch, with adapters also adding compatibility with existing EF, EF-S, TS-E and MP-E lenses. This is certainly a camera that Canon hopes will stop their shooters jumping ship to Sony.
The EOS R appears to trump the a7III in a few key areas.
It has a better LCD display with 2.1 million dots vs only 921,600 dots on the a7III, the display is also fully touch enabled so you can use it to navigate the menus, unlike the a7III which only lets you select your focus points. It’s also fully articulating, unlike the a7 III which is only able to tilt up and down. There’s also an LCD panel on the top of the camera.
The EOS R also has internal (time-lapse) recording which Sony for a reason only known to them decided not to include with the a7III, and even removed the option to add this via Play Memories. The EOS R also gets 10-bit 4:2:2 (via HDMI) compared with 8-bit 4:2:2 on the Sony. It also gets 5655 autofocus points, compared with 693 phase and 425 contrast focus points on the a7III. This is quite the difference! I don’t yet know the technical differences between these points, but hopefully I can clarify this soon. Canon claims that the EOS R is dust and water resistant, which we know is one of the a7 III’s weak points.
The EOS R also has a mechanism to close the shutter when the camera is powered down and adjust settings accordingly to protect the shutter curtain and avoid getting dust on the sensor. I think this is a feature that all Alpha Shooters would love to have. Along with an included battery charger!
But it’s not all bad news for Alpha Shooters. The a7 III does have dual SD-Card slots (only one supports UHS-II), whereas the EOS R only has a single UHS-II slot. Official battery life figures for the a7III are 710 shots vs 370 shots with the EOS R, so the EOS R is clearly a little thirstier when it comes to the juice.
The EOS R shoots continuous at up to 8 FPS, or only 5 FPS with AF tracking, this compares with 10 FPS for the a7III or 8FPS with live view. The EOS R is also missing any form of in-body image stabilization like the 5-axis IBIS on the a7III. The EOS-R does get eye AF, but only with single focus shooting, whereas the a7 III supports eye AF with continuous AF tracking.
The a7 III also supports 24p/25p 4K video recording with zero sensor crop, which is achieved by capturing 6K then downsampling to 4k. The EOS R has a sensor crop of 1.74x when shooting in 4k.
As for the price, Canon will be selling the body-only for $2,299.00, which is $300 more expensive than the a7III.
New details are coming out regarding the EOS R all of the time, so I’ll be updating this article just as soon as new information comes in.
Just to finish for now. Despite being a Sony Alpha Shooter myself, I’m definitely excited to see Canon along with Nikon finally taking mirrorless seriously. Increased competition will benefit all of us in the long run, with amazing new cameras packed full of technology, and hopefully a few good price wars too!
* Sony a7 III Price Check
* Canon EOS R Pre-Orders
Pre-orders for the EOS R will start on the 12th September.