The fastest and lightest 135mm telephoto lens in its class. Ideal for indoor sports photography and portraits with background blur. Two UD-glass elements correct secondary spectrum for outstanding sharpness and color. Compatible with Extender EF 1.4x and 2x.
Focal length and maximum aperture: 135 mm 1:2
Lens construction: 10 elements in 8 groups
Diagonal angle of view: 18°
Focus adjustment: Rear focusing system with USM
Closest focusing distance: 0.9m / 3ft