Specifications:

Brand Canon
Focal Length 135mm
Aperture Maximum: f/2
Minimum: f/32
Camera Mount Type Canon EF
Format Compatibility 35mm Film / Full-Frame Digital Sensor
Angle of View 18°
Minimum Focus Distance 2.95′ (90 cm)
Magnification 0.19x
Maximum Reproduction Ratio 1:5
Optical Design 10 Elements in 8 Groups
Diaphragm Blades 8, Rounded
Autofocus Yes
Filter Thread Front: 72 mm
Dimensions (DxL) Approx. 3.25 x 4.41″ (82.5 x 112 mm)
Weight 1.65 lb (750 g)
Package Weight 1.2 kg
Box Dimensions (LxWxH) 8.11 x 5.512 x 5.433″

Features:

Medium-length telephoto prime is designed for full-frame Canon EF-mount DSLRs, however can also be used with APS-C models where it provides a 216mm equivalent focal length.

Bright f/2 maximum aperture benefits working in low-light conditions and also affords significant control over depth of field for working with selective focus techniques.

Two ultra-low dispersion (UD) elements greatly reduce chromatic aberrations and color fringing for improved clarity and color accuracy.

Super Spectra coating has been applied to individual elements to minimize ghosting and flare for greater contrast and color neutrality when working in strong lighting conditions.

A ring-type Ultrasonic Motor (USM), along with an rear focusing system, is employed to deliver fast, precise, and quiet autofocus performance as well as full-time manual focus override.

Rounded eight-blade diaphragm contributes to a pleasing out of focus quality that benefits the use of shallow depth of field and selective focus techniques.

As a member of the esteemed L-series, this lens is dust and moisture-resistant for working in inclement environmental conditions.

Compatible with optional EF 1.4X and EF 2X teleconverters.