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

20_40F28_1_
Review Date: Jun 3, 2007 Recommend? yes | Price paid: $400.00 | Rating: 10 

 
Pros: sharp at f2.8, excellent build quality
Cons:
Slight ca, slight flare, colours not quite as vivid as a canon lens, noisy motor

For $400 you get a supremely well built professional lens which whilst lacking the focusing speed of a usm or the colour pop of an L it provides unrivalled value in terms of cost/performance ratio.

Forget the negative vibes this is a great lens for the money.