Ross Martin wrote: Douglas L wrote:
Thanks again, Ross. I read somewhere more than once that if compressed raw is chosen, the AF calculation drops from 60/seconds to 30/seconds? I wish there is an official Sony white paper with the technical details. Both ChatGPT and Gemini got conflicting information.
You can trust Mark Galer’s info (Sony Imaging Ambassador). It’s the opposite of what you heard - AF calculations drop to 30 per second if you are shooting in one of the 14-bit raw settings - Lossless or HQ - and when you choose standard Compressed (which is lossy) it goes to 12-bit and now you have the maximum 60 calculations per second (but your A1II is still better at 120 per second in full 14-bit). Jan Wegener also reports this same info and says it came from Sony.
Here is the slide from Mark Galer’s video review:
Thank you very much for searching the data, Ross! It makes sense. Much appreciated!
I took my new A7RVI for a spin this afternoon at a local airshow. Horrible weather, drizzling and foggy. The F-16 demo didn't fly, the French and British teams shortened their shows considerably, The Blue Angels performed a "low show" due to the low cloud ceiling.
I used electronic shutter and compressed raw for the shoot. A few initial observations:
1. After several hours (not constantly shooting), the battery still had 55%! I would have had to change the battery in the A1II already.
2. The buffer certainly didn't feel like 130 in shooting compressed raw, I felt it filled quite a bit earlier than the A1II. Of course, that's not a scientific comparison, I have used the A1II since it first came out so I do have a sense of its buffer.
After reading a lot of reviews and tried it on an electric fan at home yesterday, I knew full well that the sensor readout speed will cause rolling shutter effect in some situations. Otherwise Sony may be selling the A7RVI $1000 more than the A1II instead of $2000 less.
So today I tried it on a Coast Guard chopper and a V-22 Osprey, at very slow shutter speed and much higher shutter speed, which is much much higher than the shutter speed I normally use for that type of aircraft. Just as I expected, at very low shutter speed, the rolling effect is "masked" by the blades' motion. At higher shutter speed, the rolling shutter effect can be very visible sometimes. Again, I don't normally shoot these types of aircraft at such high shutter speed, so I think I will do fine at low shutter speed with the A7RVI's electronic shutter. I just wanted to experiment, that's all, not a knock on this fantastic camera at all. As long as one knows its shortcomings and deals with it accordingly (like using mechanical shutter in those situation), it's a nice piece of equipment.
Have a look at the blades of the Osprey in the first picture. The chopper's blades in the 3rd picture also show visible rolling shutter effect but nowhere as bad as the first picture, look at the length of two of the blades of the chopper in the 3rd picture. When I looked at the baseball game pictures @hyken posted recently, the arms in some shots looked too long and twisted to my eyes.
Jun 28, 2026 at 06:19 PM
Previous versions of Douglas L's message #17063236 « Sony A7RVI »
. The chopper's blades in the 3rd picture also show visible rolling shutter effect but nowhere as bad as the first picture, look at the length of two of the blades of the chopper in the 3rd picture. When I looked at the baseball game pictures @