N°8653257 · Family detail
CanonZoom·CANON EF mount·2003
Canon EF 17-40mm F/4.0L USM
Specifications01
MountCANON EF
Focal length17-40mm
Max aperturef/4
TypeZoom
Release year2003
Weight500 g
Filter size77 mm
Physical length97 mm
Min focus distance0.28 m
Max magnification0.2398
Aperture blades7
Optical elements12
Groups9
AutofocusYes
StabilizationNo
Aperture controlNo
Sensor coverageFull Frame
Additional Info02
Lens TypeZoom lens
Field Notes02
Canon EF 17–40mm f/4L USM is a Canon EF full-frame zoom for landscape and general wide-angle to standard use. It has a constant f/4 maximum aperture and ultrasonic autofocus.
AI-assisted summary — verify against linked sources
Other Mounts03
No alternate mounts are indexed for this family yet.