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Canon EF-S 17-55mm VS Sigma 17-50mm VS Tamron 17-50mm?

Started Jan 7, 2013 | Discussions thread
jitteringjr Veteran Member • Posts: 3,608
Re: Canon EF-S 17-55mm VS Sigma 17-50mm VS Tamron 17-50mm?

Sovern wrote:

A 50 1.8 and 85 1.8, if you need wide angle just use the kit lens. 17-55 is short for portraits even on crop as the perspective does not change crop body or not.

The 85/1.8 is great no doubt about that, but the 50/1.8 is crap.  Focusing is so hit or miss on mine, that I shoot at f2.8 anyhow just to try to get more DOF and have a chance of getting my subject in focus.  The Canon 50/1.4 is soft as hell until f2.2-2.5 so you are really only gaining a 1/3 to 2/3 a stop there.  The Canon and Sigma 17-5X's are sharp wide open at 50(55)mm.

Your second part of that statement really needs to be clarified.  If you shoot with a 50mm lens on full frame and crop, from the same camera location, then yes the perspective would not change.  The problem with that logic is that you are not shooting the same framing.  You would have to move the crop camera back 1.6X times further in which case you are changing the perspective.  Perspective is related to camera position not focal length.

Also its funny you mention the 50/1.8 if the 17-55 is too short for you.

 jitteringjr's gear list:jitteringjr's gear list
Canon EOS 7D Canon EF 50mm F1.4 USM Canon EF 50mm F1.8 II Canon EF 85mm F1.8 USM Canon EF 135mm F2L USM +9 more
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