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DPChallenge Forums >> Hardware and Software >> Zoom/Focus Control - Two Touch??
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Showing posts 1 - 3 of 3, (reverse)
AuthorThread
 02/03/2007 10:37:04 PM · #1
Looking at this lens is says two touch zoom/focus control.
What does that mean? How does it work?

Sigma Zoom Wide Angle-Telephoto 28-70mm f/2.8 EX DG

02/03/2007 10:48:17 PM · #2
I believe that just means one ring is for focus and one is for zoom.
02/03/2007 10:59:03 PM · #3
It just means it as separate rings for focus/zoom.

I have this lens and while it is currently my favorite lens does get a bit soft on the edges at 28mm f/2.8
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