CFExpress v2 vs v4 opinion

[Sean2260]

So I had a7R4 and had I thought my bottleneck with write speeds was the SD cards. I would do short bursts and then sit and wait for buffer to clear which was aggravating. Then I got the a7R5 and found the processing speed improvement almost did away for the desire to have CFExpress. Tested out last fall and I was not running into the same buffer problem using the same SD cards.

But still I think to get a couple of CFexpress anyways because I am stupid. Or maybe I am just stupid but still should get couple of cards. Right now I have 2x 64GB Sony Tough, and the primary use is when I travel (Africa) to image animals (photo & video) and sometimes use the burst to get better chance at ideal photo (those animals just do not take direction well, zero chance they become models in Paris).

But do I really need v4 (higher price) or will v2 upgrading SD cards be more than I need? B&G has 256GB for $199 whereas the v2 160GB is $129. Most if any videos would be just couple minutes and would be 4k 24fps or 60fps (no 120fps), and burst are usually 10-15 images at a time, with possible need to take multiple burst in succession. In all my trips I can only remember a couple times I filled up a card in one day, and part of routine is always to transfer that days images to laptop & SSD drives.

 

[Drawshot]

I think the card slots in all Sony cameras are still only v2. So you won't see any difference between v2 and v4 cards when using them in the camera. The one advantage in using v4 cards is that transferring your images and video to a computer with a v4 card reader is much faster.

 

[iamdlewis]

So none of the Sony cameras can write to the cards at the v4 speed but that does not mean that your next camera will not. I still occasionally use some SD cards that I got to use with my A9 8 years ago and I am still using CFA cards I got 5 years ago with a second body. So if you get quality cards (SD or CFA) they will most likely outlast the body that you were using when you got them.
Just because the camera can't write at the max speed of the card doesn't mean that the higher speed is useless because at some point you will want to offload the images and your PC and reader will most likely be able to use that speed. The read speeds of the v4 are twice that of the v2 so in theory offloading should take half the time.
If you want to follow this one of the keys is to get a high quality card and though this isn't your camera it doesn't change the quality of the card: https://www.alphashooters.com/cameras/sony-a7v/memory-cards/

I don't know how many trips you have done for photography and especially ones for wildlife but I HIGHLY suggest that you have space for 8-10k images and a way to offload those images. You may have never taken that many images before but these trips are not something many of us will do many times and that will hit you and you will realize that it is better to take the shot and delete it later than miss the shot.