Canon EF 70-200mm f/4L USM Lens

Features:

• EF-Mount Lens/Full-Frame Format
• Aperture Range f/4 to f/32
• One Fluorite Element and Two UD Elements
• Super Spectra Coating
• Ring-Type Ultrasonic Motor AF System
• Internal Focus, Focus Range Limiter
• Weather-Sealed Construction
• Rounded 8-Blade Diaphragm

The EF 70-200mm f/4L USM is a Canon L-series optic spanning a useful portrait-length to medium telephoto range. The constant f/4 maximum aperture allows you to maintain a consistent exposure throughout the zoom range and also contributes to the sleeker form factor when compared to other 70-200mm lenses. In regard to its optical performance, this lens employs one fluorite element and two ultra-low dispersion elements, which work in concert to suppress chromatic aberrations and color fringing for notable clarity and color accuracy. A Super Spectra coating has also been applied to control flare and ghosting for improved contrast when working in harsh lighting. Complementing the optical attributes, this lens also features a ring-type USM and internal focusing mechanism for quick, quiet, and accurate autofocus performance, as well as full-time manual focus override.

• Versatile telephoto zoom is designed for full-frame Canon EF-mount DSLRs, however, can also be used with APS-C models where it provides a 112-320mm equivalent focal length range.
• Constant f/4 maximum aperture affords consistent performance throughout the zoom range and also contributes to the relatively lightweight design and compact form factor.
• One fluorite element and two ultra-low dispersion glass elements noticeably reduce color fringing and chromatic aberrations for high clarity and color fidelity.
• Super Spectra coating has been applied to individual elements to minimize ghosting and flare for greater contrast and color neutrality when working in strong lighting conditions.
• A ring-type Ultrasonic Motor (USM), along with an internal focusing system, is employed to deliver fast, precise, and quiet autofocus performance as well as full-time manual focus override.
• Focus Limiter switch lets you constrain the focusing to two different ranges to suit different applications: 3.9'-infinity or 9.8'-infinity.
• The rounded eight-blade diaphragm contributes to a pleasing out-of-focus quality that benefits from 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.
• The optional rotating tripod collar is available and benefits working with the lens atop a tripod or monopod.
• Compatible with optional EF 1.4X and EF 2X teleconverters.