The Canon 85mm f/1.8 EF USM Autofocus Lens is a highly practical medium telephoto lens with superb delineation and portability. Images are sharp and clear at all apertures. Through computer simulations, the lens has been designed to give beautiful background blur. Since the front lens group does not rotate during focusing, special filter effects are not affected. Fast Maximum Aperture The lens's bright fast f/1.8 maximum aperture makes this lens an ideal choice for low-light photography. The lens provides you with a shallow depth of field which is ideal when shooting portraits giving you pleasing background blur. Fast, Smooth and Accurate Auto-focus The lens fast ultrasonic autofocus motor delivers, best of all it is silent which is ideal when you are shooting videos. The lens' fast focusing and accurate shots are beautiful and crisp too. Superb Image Quality The lens will provide you with crisp photos at all times, it can even handle the most sensitive lighting conditions with ease. Its unique design is able to grab the ambient light and produce the sharpness and accuracy you would expect form a quality Canon lens.