Bill,

> I have the Sigma 17-35 and have been happy with it. One
> thing to know
> before you make your decision is that the HSM on that
> Sigma is 'micro-HSM'
> with no full time manual focus, where as the Canon 20-35
> is ring-USM, with
> full time manual focus.

Are you sure? As the 3.5-4.5/20-35 USM is a consumer lens, I doubt if
it has ring USM.

Best regards,
Marco

-------------------------------------------------
Marco Kost
Journalist - Bild und Text
Otto-Mair-Ring 5
83607 Holzkirchen

Tel.: 08024 / 47 41 55
Mobil: 0179 / 118 9113

Website: www.mountains-and-more.de
Email: [EMAIL PROTECTED]
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