At 15:28 21/11/00 -0800, Kotsinadelis, Peter (Peter) wrote:

>Even better,
>
>400mm F2.8 divided by 2 yields a 200mm F1.6.

I think it is a 200mm f1.4, since 2.8/2 = 1.4
(or two stops faster than f2.8 is f1.4).

Rodrigo Gimenez
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