Thefrom is a short telephoto prime well-suited to portraiture applications. As an L-series lens, it is characterized by a sophisticated optical layout that includes one glass-molded aspherical element to greatly reduce spherical aberrations and distortion for improved sharpness and clarity. Individual elements also feature an Air Sphere coating (ASC) to suppress lens flare and ghosting for greater contrast and color fidelity in backlit situations.
- Portrait-length prime is designed for full-frame Canon EF-mount DSLRs, however can also be used with APS-C models where it will provide a 136mm equivalent focal length.
- Fast f/1.4 maximum aperture offers extensive control over depth of field for working with selective focus techniques. This bright design also benefits working in low-light conditions.
- One glass-molded aspherical element helps to reduce distortion and spherical aberrations for improved sharpness and clarity.
- 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.
- 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.