« on: July 24, 2012, 12:58:58 AM »
Existing EF lenses might have their images come out in a different way (they might be "fatter" at the point of the mount - leading to loss of image / vignetting at the edges. They might not be 100% compatible with a FF EF-M mount. But they would still work in crop mode.Except you've now destroyed the point of a full-frame mirrorless camera. Who is spending $1500-2000 (or more) on a camera that can't even work with their existing EF lenses with an adapter? Where they can still only get APS-C quality out of their L lenses.
It would require Canon to create at least a dozen L quality EF-M lenses, comparable to the EF versions, releasing before or at the same time as the full frame mirrorless...and customers that wantt to spend the extra money for all new lenses as well. By that point, it might not even be genuinely cheaper than a Leica system, because it'd be such a niche product they'd have to charge a premium.
It's why I'm not sure I see a full-frame mirrorless anytime soon. The current systems don't quite match DSLR usability, and the only way Canon could really pull it off would be to make it EF mount, which means the size advantage would be fairly limited as well.