Driven by the following post, I wanted to know more precisely how far I can go with the EOS M3.
https://chdk.setepontos.com/index.php?topic=12758.270After initial fear I tested the whole thing up to 1/100000s.
1/8000s still works pretty well but after that the changes keep getting smaller.
A maximum of -1.8EV are still there.
I took three pictures of each shot.