>>3130079Not him but the thickness of the sensor stack is very important.
Lenses optimized for film (=no sensor stack) will lose sharpness on digital sensors (at least some sensor stack).
- Digital Leica's have very thin sensor stacks (purposely so old Leica lenses work well on new digital Leica's)
- m43 has a very thick/ sensor stack.
- Nikon and Canon are somewhere in-between.
A Canon lens on a m43 body will not be very sharp, and a Leica lens will be even worse - unless you use a speedbooster that actually compensates for the differences in sensor stacks.
