new Sigma 200-500 f/2.8 EX DG

Started Mar 8, 2007 | Discussions thread
mark currier Senior Member • Posts: 1,452
Re: new Sigma 200-500 f/2.8 EX DG

I believe that the rear ring closest to the camera mount is the zoom (the other being the focus). It is most likely a fly-by-wire system as a physical zoom ring would just be unreasonable for a lens of this size (diameter) in the amount of turn required in degrees to achieve a zoom through the full range.

DTemp wrote:

Its a zoom... so it needs a zoom ring... but I dont really see one!
I mean theres a little ring behind the LCD but im assuming thats
focus since its tiny... how do you zoom this big mother?
-Dave T.

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Mark Currier

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