06-14-2010, 11:53 PM
[quote name='Sylvain' date='15 June 2010 - 04:26 AM' timestamp='1276540004' post='511']
Is the front element shape really a function of the maximum aperture? Although designed for four thirds, pana & oly 7-14 f/4 lenses are similarly shaped. Same with sigma 8-16 & 12-24 lenses (wider of course but still).
If so, complaining about this shape seems like complaining about a FWD car having a four wheels transmission.
[/quote]
Good point about the 7-14s, Sylvain. I was mainly referring to how the Sigma 12-24 goes down to 12mm without having a front element as large as the 14-24, because of its slower max f number. The shape of course has to be there for the FOV.
GTW
Is the front element shape really a function of the maximum aperture? Although designed for four thirds, pana & oly 7-14 f/4 lenses are similarly shaped. Same with sigma 8-16 & 12-24 lenses (wider of course but still).
If so, complaining about this shape seems like complaining about a FWD car having a four wheels transmission.
[/quote]
Good point about the 7-14s, Sylvain. I was mainly referring to how the Sigma 12-24 goes down to 12mm without having a front element as large as the 14-24, because of its slower max f number. The shape of course has to be there for the FOV.
GTW