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I want tack sharp images, Canon 17-50 or15-85?

Started Apr 18, 2016 | Discussions thread
bludragon Forum Member • Posts: 77
Re: I want tack sharp images, Canon 17-50 or15-85?

I have a 15-85 and really like it.  Good IS, fast and accurate focus, and pretty much sharp across the zoom range at f/5.6.

Tests show the 17-55 f/2.8 is slightly sharper, but there is not a lot in it with both set to f/5.6. (dxo labs have the 15-85 being slightly weaker outside the center at 50mm).  Both lenses get a little softer when wide open, but of course you have an extra stop or two to play with on the 17-55.

I also have the kit 18-55 and 55-250 IS lenses (the first iteration of each).  Good results are possible with both of those, but in practice it is harder to get accurate focus while walking around and taking pics of moving objects and the difference is noticeable to the 15-85 on my 450d.

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