| Latest Review Posted | Sigma DC 18-125mm F3.5-5.6
This lens is lighter and smaller than other superzooms, but the IQ is still quite good. The convenience of a simple one-lens kit is an enormous advantage in many situations. The lens is an incredible value for the money.
Distortion: modest distortion at the short end; probably only noticeable if you are photographing things with straight lines in the outer portions of the frame.
Vignetting:
at 18mm, stop down to f/11-f/16 or occasionally more to get really perfect corners
at 21mm, f/5.6-f/6.7 is sufficient
at 30mm, f/4.5-f/5.6
at 50mm, f/5.6-f/6.7
at 70mm, f/8-f/11
at 125mm, f/11-f/16 or perhaps more
Summary: In the middle of the zoom range, vignetting is no problem, but at the short end and near the long end it may require some workarounds. Vignetting is somewhat but not dramatically worse than my DA 18-250.
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