A
>Subject: RE: EOS 20/2.8 vs 20-35/3.5-4.5
>Surprisingly, the MTF data from Photodo suggests that the
>20-35/3.5-4.5 is very similar in optical performance to the
>20/2.8
>
>I saw in a local shop that the 20-35 has a flare-cutting diaphgram,
>while the 20/2.8 does not.
There is no point in using a flare-cutting diaphgram in a prime lens.
The flare-cutting diaphragm is a diaphragm that changes as you change the
focal
lenght of the lens in order to vignete the non used light rays.
As the 20/2.8 has only one focal lenght there is no point in such diaphagm.
> .....
>Cheers
>Julian Loke
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>Julian,
>
>"Flare cutting diaphgram", is that what they call the rectangular mask?
No, its another thing as explained above.
>James
Best regards
Vicente
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