> The 35/2 and the
>35/2.8 have the same 63° angle of view, but the former takes 55 mm and the
>latter takes 49 mm filters. Go figure. It has to be a simple matter of lens
>design.
>
Maybe another factor is whether the lens uses a floating element? Maybe the
lens has to be larger in diameter in order to accomodate the extra mechanism
for that?? But, I think the 85/2 has a floating element???
Be seeing you.
Dirk Wright
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