Short portrait-length prime lens offers a 63mm equivalent focal length to realize a slightly narrowed field of view for isolating subject matter.

Impressively bright f/1.7 maximum aperture offers great control over depth of field for working with selective focus techniques and also suits working in low-light conditions.

Two Super ED elements greatly reduce chromatic aberrations and color fringing throughout the aperture and focusing ranges for notable clarity and color fidelity.

One aspherical element controls distortion and spherical aberrations in order to achieve high sharpness and accurate rendering.

Physical aperture ring allows for intuitive adjustment over exposure settings and incorporates a C (Command) position to permit camera-based aperture setting.

Dust- and weather-sealed physical construction enables working in harsh climates and temperatures as low as 14°F. Also, the front element features a fluorine coating to repel dust, dirt, and moisture and to aid in cleaning.

Rounded nine-blade diaphragm contributes to a pleasing bokeh quality.

An Air Sphere Coating (ASC) has been applied to lens elements to reduce backlit flaring and ghosting for maintained light transmission and high contrast in strong lighting conditions.

A ring-type Ultrasonic Motor (USM), along with optimized focusing algorithms and a high-speed CPU, is employed to deliver fast, precise, and quiet autofocus performance as well as full-time manual focus override.

Optical image stabilization minimizes the effects of camera shake by compensating for up to four stops of shutter speed.

Rounded nine-blade diaphragm contributes to a pleasing out of focus quality that benefits the use of shallow depth of field and selective focus techniques.

As a member of the esteemed L-series, this lens is sealed against dust and moisture for working in inclement environmental conditions.

Fluorine-coating on exposed elements affords protection to the optical system, resists smudging and fingerprints, and is easier to clean.