Specifications:

Brand Canon
Focal Length 135mm
Maximum Aperture f/1.8
Minimum Aperture f/22
Lens Mount Canon RF
Lens Format Coverage Full-Frame
Angle of View 18°
Minimum Focus Distance 2.3′ / 70 cm
Maximum Magnification 0.26x
Optical Design 17 Elements in 12 Groups
Diaphragm Blades 9, Rounded
Focus Type Autofocus
Image Stabilization Yes
Filter Size 82 mm (Front)
Dimensions (ø x L) 3.5 x 5.1″ / 89.2 x 130.3 mm
Weight 935 g

Features:

Impressively bright f/1.8 maximum aperture affords extensive control over depth of field for selective focus applications and also benefits working in low-light situations.

Three ultra-low dispersion elements control a variety of aberrations in order to achieve high sharpness, clarity, and accurate color rendering.

Both Air Sphere and Super Spectra Coatings improve image quality by maintaining high contrast and color accuracy while reducing lens flare and ghosting when working in strong lighting conditions.

Rounded nine-blade diaphragm contributes to a pleasing bokeh quality.

Nano USM delivers fast, accurate, and near silent autofocus performance to benefit both photo and video applications.

Customizable Lens Function buttons on the barrel permit intuitive tactile control and rapid access to shooting settings.

Benefitting handheld and monopod-based shooting, Optical Image Stabilization compensates for 5.5 stops of camera shake, or up to 8 stops if paired with in-body image stabilization, for sharper imagery.

Weather-sealed design for reliable use in inclement conditions.

Fluorine coating on front element helps repel moisture, dust, and fingerprints and is also easier to clean.

Configurable Control Ring can be used to adjust a variety of exposure settings, including aperture, ISO, and exposure compensation.