neuroanatomist said:
privatebydesign said:
neuroanatomist said:
ahsanford said:
There is a raging debate on this right now on the FF mirrorless post from a few days ago.
Canon can't reasonably support 4 mounts. They have tough decisions to make by the time FF mirrorless arrives.
I'm not convinced they can't just have one EF-M mount, and apply a firmware-driven crop mode when an EF-M lens with an APS-C image circle is mounted.
Note that the Sony FF E-mount has a
smaller throat diameter than the EF-M mount. Superimposing the Sony FF sensor onto the M mount opening suggests that it may work...
It would be a master stroke if they do, and true testament to how forward thinking Canon are as a company.
I suspect you might be right, time will tell........
We're likely talking about a millimeter or less if it doesn't fit. I suspect the EF-M mount was designed to be exactly the minimum size needed to support a FF sensor as Canon would design it (including throat diameter, contact pin placement, etc). Honestly, I think Canon would be egregiously stupid not to have considered putting a FF sensor behind that mount and designing it accordingly. As you say, time will tell.
I think it's a little more complicated than that. Way back in 1987, when the EF mount was introduced, there was a reason why it was made so large: the Canon EF 50 f/1 lens, introduced soon afterwards. With the introduction of the EF mount, Canon went from having the smallest lensmount (i.e., FD) among major manufacturers to having the largest and Canon was quoted in Modern Photography or Popular Photography as stating that the 50 f/1 could not have been made with a smaller lensmount. In 1987, I had a major investment in Canon MF equipment and was livid for the next 10 years that Canon didn't introduce an MF body with an in-viewfinder focusing indicator even without a way of controlling lens focus from the body. The Canon T90, co-designed with the EOS-1 film camera, would have been the perfect place for it.
Granted that it's not 1987, but large lens mounts do have real advantages with certain classes of lenses. The CEO of Sigma has been quoted, within the last year or so, as stating that the small size of the FE lens mount presents problems in designing lenses for it.