EF 14mm f2.8L USM
The EF 14mm f2.8L USM is a super wide-angle 14mm lens with a focal length which is especially popular among professional photographers in the FD range.
Although the EF 14mm is a USM (ultrasonic motor) lens, it does not use an electronic ring for manual focusing. Instead, it employs the new mechanical manual focusing system found in the EF 35-135mm f4-5.6 USM and EF 70-210mm f3.5-4.5 USM lenses, allowing manual focusing to be carried out at any time while in the AF mode. The USM system allows silent, high-speed focusing in the AF mode.
Although based on the FD 14mm f2.8L, this lens employs a completely new optical design. The second of the 13 elements (in 10 groups) is a large-aperture aspherical lens which reduces distortion to an extremely low level. Astigmatism, which tends to be a problem at close focusing distances, is greatly reduced by a special rear focusing design. This varies the distance between the front lens and the focusing lens group according to the shooting distance.
The lens measures ø 77 x 89mm and has a built-in lens hood for front element protection. This hood is cut to prevent vignetting. Rear-mounted gelatine filters are used; up to three can be fitted at any one time.
Focal length and maximum aperture: 14mm f/2.8