Marco Kost wrote:
>
> 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
According to Canon USA web site the 20-35 has USM..... Other lenses are
MM, micro motor.....
Bob
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