The EF 50mm f/1.4 USM is sharp, small, fast and inexpensive. Combine all that with impressive image quality and performance, its no wonder why this fantastic lens can be found in many a photographer’s kit, no matter what their level of professionalism. It is one of the most useful 50mm lenses produced by Canon. Crisp images with minimum flare are obtained even at the maximum aperture of f/1.4. Autofocus action is fast, smooth and silent thanks to its ultrasonic autofocus motor (USM). The lens works exceptionally well in low-light conditions, and is a great travel companion due to its compact, lightweight design.