It cannot be a Biogon design of course, as the rumor speculates.
Why can\'t it be a biogon design? The 35/2 Biogon doesn\'t appear to go significantly beyond the mount like some of the wider Biogons, especially once the rear is adjusted for the flange difference (I don\'t believe the 35 Biogon + Leica M adapter goes into the mount much if at all, but I guess I could be wrong)
Because the Biogon design causes severe color vignetting and smearing on the A7/A7r due to the positon of the exit pupil. Zeiss could of course call it whatever they want - including Biogon - but it could not be a true Bigon design or it would cause these issues, as the existig Biogon\'s do (including the ZM\'s). Heck, some of the ZM Biogons even cause issues on the Leica digitals (21/4.5 for instance).
Said another way the biogons don\'t have an exit pupil that is far enough away from the sensor.
Aug 26, 2014 at 01:27 PM
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