Canon EF 135mm f/2L USM Prime Lens

Medium telephoto prime for portraits

The Canon EF 135mm f/2L USM is a medium telephoto prime designed for full-frame EF-mount cameras. Its f/2 maximum aperture gives photographers strong control over depth of field for subject isolation. The bright aperture also supports handheld shooting in low-light conditions. This L-series lens suits portrait and event work where a longer focal length is preferred.

Optical performance under sustained use

Two ultra-low dispersion elements control chromatic aberrations and colour fringing across the frame. A Super Spectra coating suppresses flare and ghosting to maintain contrast and colour accuracy in backlit or high-contrast scenes. The ring-type ultrasonic motor provides quick and quiet autofocus with full-time manual focus override. The rounded 8-blade diaphragm produces smooth background rendering at wider apertures.

Upgrade path from slower telephotos

This lens replaces variable-aperture zooms or slower primes that limit depth-of-field control and low-light capability. The jump is worth it when you need consistent f/2 brightness throughout the focal length and L-series optical corrections. Photographers who require wider angles or zoom flexibility should consider other focal lengths. The aperture range extends to f/32 for extended depth of field when stopped down.