The EF 180mm f/3.5L Macro USM Lens from Canon is a high quality prime telephoto lens with 1:1 macro capability for sharp close-up photography. It is also ideal for portraiture and general telephoto shooting. An ultrasonic autofocus motor enables fast, smooth and quiet autofocus and manual focus override allows for precise manual focus, even in AF mode. Its internal focusing feature does not cause the lens length to change or the front element to rotate during focusing, which is particularly important when shooting macro. Three UD-glass elements correct residual chromatic aberrations and provide overall sharp, high contrast imaging. A telephoto prime lens ideal for shooting distant subjects, portraiture and, with 1:1 life-size magnification, macro close-up photography. Ultrasonic autofocus motor, inner focus system and floating lens elements enable fast, smooth and silent AF action. The front of the lens does not rotate or extend when focusing. Focusing distance range can be selected