A good portrait lens with a wide aperture is often worth its weight in gold for many photographers, but unfortunately, many such lenses actually cost about their weight in gold as well. That makes the Yongnuo YN 50mm f/1.8S DA DSM, which offers a 75mm equivalent focal length and costs $129, a breath of fresh air. Can it keep up with more expensive options? This excellent video review takes a look at the sort of performance and image quality you can expect in usage.