I am experimenting with 10-stop ND filter and an app to calculate exposure time, to get long exposure in daylight on Sony A7R5. If the app suggests an exposure time of 2 minutes I dial that in to the exposure time under Bulb Timer Settings. Exposure turns out fine. Then I thought, lets see what happens if I dial in an exposure time of 3 minutes. You would think it would be way over exposed, totally blown out, and it is when I try the same experiment on my DSLR. However the shot comes out fine again. Tried various other timings to try to over expose, but shot always came out fine. Totally baffled.
