Years ago, Sigma reinvented themselves with the Art series, which quickly grew into a full line of highly respected lenses, known in particular for their image quality and affordable prices. The company has continued to expand its offerings, which now include the Contemporary line, meant to "achieve a balance between convenience and performance." The 20mm f/2 DG DN is the latest entry in that line, and this excellent video review takes a look at the performance and image quality you can expect from it.