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  Reviews by: Chris Beaumont  

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Sigma 20-40mm f2.8 EX Aspherical DG DF

20_40F28_1_
Review Date: Oct 1, 2007 Recommend? no | Price paid: Not Indicated | Rating: 5 

 
Pros: Well balanced, good size and weight, fast.
Cons:
Massive distortion!

I only rented this lens for a job I've just finished today where I needed a wider angle lens than my 28-105, it's a nicely built lens, very solid, focuses quickly and accurately, image quality is fairly impressive, not a patch on my 70-200L, but a good match for the 28-105 3.5-4.5 USM.

The big drawback though is a HUGE amount of barrel distortion (at least on this copy) at 20mm, and bear in mind I used this on a 1.6x crop camera (30D) so what it's like on a full frame camera I don't even want to think about.

I won't be buying one, I'll be getting a Tamron 17-50 F2.8 instead.