For its price, the Canon EF 50-millimeter f/1.4 UltraSonic Motor Lens is a good deal for how versatile it is. The autofocus feature is fast and quiet, but the focusing is inconsistent with almost every shot even when different f-stops and distances are tested. Focus speed and accuracy can also depend on the camera body, contrast, and the light levels of the environment. That being said, when this lens is used at 1/50 shutter speed, it will produce a sharper image with less of a soft appearance.

The lens is wide enough for group and individual portraits, and will result in minimal distortion of the subjects in the photograph. However, at certain contrasts, some chromatic aberrations can occur at wide apertures. Vignettes can also happen at wide apertures on full frame. The Canon EF 50-millimeter f/1.4 UltraSonic Motor Lens has versatile focal length, and is great for low light photography with no flash. This lens is not recommended for beginners due to its need for a strong understanding of depth of field to work properly due to challenges with the focusing features.