An EF wide-angle L-series prime with an f/1.4 aperture, Blue Spectrum Refractive optics, two aspherical elements and dust- and moisture-resistant construction.
Both reviews praise build quality and fast, quiet autofocus, while noting the size and price. Digital Camera World finds excellent sharpness and contrast even at f/1.4. ePHOTOzine praises smooth background blur and central detail but finds weaker edges, visible edge fringing and flare spots with the sun outside the frame.
BR optical element between convex and concave glass elements; two aspherical lenses and one UD lens according to Canon Camera Museum
Coatings
Subwavelength Structure Coating; fluorine on front and rear elements according to Canon's product overview and Museum
Diaphragm
Nine blades with a circular aperture
Angle of view
54° horizontal, 38° vertical and 63° diagonal according to Canon UK
Mount and compatibility
Mounts
Canon EF
Image circle
Full frame
Compatibility
Canon EF full-frame and APS-C cameras
Adaptor support
Canon UK confirms EOS M use with the EF-EOS M Mount Adapter
Focus and stabilisation
Autofocus
Yes
Minimum focus distance
0.28 m
Maximum magnification
0.21×
Optical stabilisation
No
Autofocus detail
Ring USM with full-time manual focus according to Canon UK
Focus distance detail
Constant external length and non-rotating front during focusing according to ePHOTOzine
Magnification detail
Canon UK specifies 0.36–0.58× with EF12 II and 0.80–1.03× with EF25 II extension tubes
Stabilisation detail
No optical stabilisation according to ePHOTOzine's exact-model specification
Design
Dust and moisture resistant
Yes
Filter diameter
72 mm
Maximum diameter
80.4 mm
Length
105.5 mm
Weight
760 g
Weather resistance
Mount, switches and focus ring have dust- and water-resistant construction; not described as waterproof
Dimensions detail
80.4 mm maximum diameter × 105.5 mm length and 760 g according to Canon UK
Lens hood
Supplied EW-77B hood according to Canon UK's box list
In the box
Lens, E-72II front cap, Lens Dust Cap E, LP1219 case, EW-77B hood and user manual according to Canon UK
Release detail
Canon's August 2016 retrospective explicitly records release in September 2015; its Museum table records October 2015, also the originally scheduled month in the August 2015 announcement
