EF 24mm f1.4L USM
This wide-aperture lens is Canon's first EF 'L' series wide-angle lens. It is also the first L-series lens to use environment-friendly lead-free glass for all the elements. A wide-angle lens has become teh standard lens for many of today's photographers. It offers excellent depth-of-field, enabling you to keep both subject and background sharp at medium and small apertures. It might not be the first lens you think of for portrait work, but a 24mm lens is ideal when you work to place your subject in its environment.
The 24mm f1.4L is the first EF lens to incorporate both a replicated aspherical lens element and a UD lens element to suppress distortion, spherical aberrations and lateral chromatic aberrations. A floating element construction maintains excellent resolution at close focusing distances. Of particular interest to professional photographers is the ring-type ultrasonic motor which provides near-silent and hig-speed autofocusing.
Two features help to reduce flare and improve contrast. There is a flare-cutting mask behind the first group of lens elements, with a flare-blocking diaphragm further back in the lens.
The lens uses rear focusing, which means that the length of the lens does not change and the front of the lens does not rotate. Polarizing, graduate and effect filters can be used without additional adjustment after focusing.
Focal length and maximum aperture: 24mm 1:1.4