Lets make this very simple. get your camera point it at your computer monitor and look at BOTH the rear lcd AND the computer monitor and then tell me how much lag you see when the timer changes the picture.
https://www.zoul.cz/shutter-lag/
Don
Good test. I have tried it a number of times. One run, I used the EVF. The 2nd run, I watched the computer screen. In both cases, I was seeing around 0.40 to 0.45 sec. No difference between the two.
This tells me two things.
1. My reaction time was was about 0.40 to 0.45 sec.
2. Lag, whatever it was, had to be much faster than my reaction time.
I was using a Sony A6300 with the lens in manual focus mode so that I wasn't waiting for the lens to focus too.
Another thing to try: While looking at the LCD, rotate the camera to the left and then to the right a number of times. If there is a noticeable lag, than as you are panning right and suddenly switch to panning left, you would see the image in the LCD continue to the right and then start moving to the left. In doing this, I see no lag. As soon as I change panning direction, the LCD records the correct direction with ZERO determinable lag.
One question I could add to this is: What is the DSLR lag time to wait for the mirror to go up in order to make a shot?
Doing some Googling of shutter lag time on the Sony A6300, I see a figure of 0,020 sec for a pre-focused lens. This is way faster than my 0.4 sec reaction time I measured above. This tells me that mirrorless shutter lag being a problem is a myth.
Also found a time for the Canon EOS 50M and it was 0.053 sec. Slower than the A6300, but still much faster than human reaction time.
