The 30mm f/1.4 DC DN Contemporary Lens from Sigma is an affordable, fast prime lens. On paper, it looks like it should be a fabulous piece of glass. I put it through its paces to see if it lived up to its marketing blurb. I never read other reviews before testing lenses, which was true of this lens. I didn't want any preconceived ideas. Furthermore, I don't own any Sigma lenses, so I made no presumptions. I didn't even look at the B&H website to see what the lens retails at; retail price is a good indicator of image quality.
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