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Canon 17-55mm or sigma 18-35mm ?

Started Feb 2, 2014 | Discussions thread
Keith Z Leonard Veteran Member • Posts: 6,134
Re: Here's an easy way to think about lenses:
1

It's very true, if you look at the 15mp reviews on photozone you really don't see a huge difference between the canon 17-55 and sigma 17-50, most notably is the corner sharpness of the canon being significantly better at 17mm @ f2.8, other wise you generally see the Sigma is slighly sharper in the center but they are very comparable.  The same is true for just about every other aspect of the image quality tests, very comparable distortions and CA, the Sigma at 17mm is 2.9% barrel vs the 2.03% of the Canon, which is again the big win for the Canon, otherwise there isn't a significant difference.

I've printed quite a few 30x20 images from the Sigma 17-50 f2.8+7D and they are just grand.  Now that you can get this lens for under 400$ on Ebay and 570$ from Amazon it's really quite attractive, they Canon price has dropped quite a bit too though.  I think it's a tough choice between these two lenses.

The video shows a significant difference in image quality between the Sigma/Canon and the Tamron, especially in the corners.  The Sigma 18-35 is a screamer but it's a bit of an oddball in the test as it's significantly different, aperture, focal length, no IS/OS/VC.

 Keith Z Leonard's gear list:Keith Z Leonard's gear list
Canon EF 70-200mm F4L USM Canon EF 100-400mm f/4.5-5.6L IS USM Sigma 50mm F1.4 EX DG HSM Canon EF 24-105mm f/4L IS USM Canon EOS 400D +16 more
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