Canon EF 70-200mm f / 4L USM lens
A flexible zoom that is distinguished by its relatively light and compact design, the USM EF 70-200mm f / 4L is an L-Series Canonoptic that covers a useful telephoto medium portrait length. The constant maximum aperture of f / 4 allows you to maintain a constant exposure throughout the zoom range and also contributes to the more elegant form factor compared to other 70-200 mm lenses. As for its optical performance, this lens employs a fluorite element and two ultra-low dispersion elements, which work together to suppress chromatic aberrations and color edges for remarkable clarity and color accuracy. A Super Spectra coating has also been applied to control flashes and phantom images to improve contrast when working with intense lighting. Complementing the optical attributes, this lens also features a ring-type USM and an internal focusing mechanism for fast, quiet and precise autofocus performance, as well as a full-time manual focus override.
The versatile telephoto zoom is designed for Canon DSLR cameras with full-frame EF mount, however, it can also be used with APS-C models where it provides an equivalent focal length range of 112-320 mm.
The constant maximum aperture of f / 4 offers constant performance throughout the zoom range and also contributes to the relatively lightweight design and compact form factor.
A fluorite element and two ultra-low dispersion glass elements significantly reduce color stripes and chromatic aberrations for high clarity and color fidelity.
The Super Spectra coating has been applied to individual elements to minimize the phantom effect and brightness for greater contrast and color neutrality when working in intense lighting conditions.
An ultrasonic ring motor (USM) is used, together with an internal focusing system, to provide fast, accurate and quiet autofocus performance, as well as full-time manual focus override.
The focus limiter switch allows you to restrict the focus to two different ranges to suit different applications: 3.9'-infinity or 9.8'-infinity.
The rounded eight-blade diaphragm contributes to a pleasant 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 to work in inclement environmental conditions.
The optional rotating tripod collar is available and benefits from working with the lens on a tripod or monopod.
Compatible with optional EF 1.4X and EF 2X teleconverters.