Reviews and Problems with Sigma 20mm F1.8 EX DG ASPHERICAL RF
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Don't Like The Sigma 20mm f/1.8
deeshooter, B&H Photo
16 June 2008
Summary: I have used everything from 35mm up to 8x10 view cameras. Shot weddings for 25+ years. Have approx 40 years experience behind a camera. Thought I would get a fast, wide prime for good image quality shooting low light / available light shots. Don't like this lens. Images are soft at best. First lens was horrible; second lens is barely acceptable. It's big and heavy. Don't care for the focusing ring which rotates as the lens focuses. Worst purchase I have ever made.