>>3961600>These faster lenses mft needs are much more expensive, and larger and heavier than their FF equivalents. And in many cases non existent.Not really. The reason why for example olympus 25 f1.2 is bigger than sony 50 f1.8 is because olympus is sharp across whole field wide open and has low level of other aberrations like coma.
Olympus or any other crop manufacturer could make fast, small and cheap lens. However, it would have compromised image quality (just like 50mm f1.8) and there are producers who do that. Just look at mitakon.
