It will have to be another optical formula, because rear elements in the Sony version sit where the Canon has mirrorbox.aceflibble said:It's hard to imagine there is much more they could do to improve on the optical formula, and simply moving to the Canon mount doesn't require new optics;
You can't, except for rare exceptions, just make front element bigger.aceflibble said:I would guess that the larger front element and filter thread is to reduce vignetting,
Depends on sensor. Except Canon everyone else's moving from FSI sensors to BSI sensors, where this issue (almost) doesn't exist. Probably Canon will, too.aceflibble said:(you get diminishing returns on apertures after f/1.6, so f/1.4 to f/0.95 is only really about half a stop difference in terms of both depth of field and light gathering)
No, it just needs aperture stop to be close to mirrorbox front; FL per se is irrelevant. However the optimal position of aperture stop is typically somewhere in the middle of the lens;aceflibble said:The only way to get a lens faster than f/1.4 on a Canon without the mirrorbox clipping would be to move to a shorter focal length,
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