Sigma 17-50mm F2.8 OS HSM

Started Apr 11, 2010 | Discussions thread
Greyser
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Re: Sigma 17-50mm F2.8 OS HSM
In reply to bdery, Apr 12, 2010

bdery , thank you for your reply? Are you talking about 17-70 lens? My question is about newly announced Sigma 17-50 F2.8. There is no exact older version of it. The closest one, but discontinued, is Sigma 18-50mm F2.8. But I believe it had a different optical design.

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