Canon Rumors said:
Canon is working on a full frame mirrorless camera. However, the general consensus amongst people that possibly know things, is that EF lenses will have to work natively and not via an adaptor, and this is a big challenge.
CR Guy, that's an 'enticing discussion piñata' if I ever saw one.
If you mean "EF lenses will have to work natively and not via an adaptor"
at the current EF flange distance, that's a
market challenge. The lenses should work brilliantly in that setup, but you'd have either a built-in 'lens tube' design like the Sigma (pictured below) or you'd literally just pull the mirror out of a current body. Both are functionally attractive to existing EF users, but both are also form-factor unattractive to competitive users and the mirrorless market in general, who associate mirrorless with 'small'.
If you mean "EF lenses will have to work natively and not via an adaptor"
at a svelte, thinner-than-EF flange distance, then yes, that's a technical challenge -- a nearly impossible ask of Canon's engineers.
Which one did you mean?
- A