The Sigma 30mm 1.4 lens promises a lot for cropped DSLR sensor user who are looking for a good, fast normal lens that they can use everyday. The f/1.4 aperture is certainly very attractive for the price. The addition of HSM motor will make the lens autofocus with any Nikon entry level DSLR camera. However, how about optical performance? See the complete review here at http://www.photoseis.com/sigma-30mm-1-4
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