Lens Models

Lens models are any interchangeable lens that has been marketed

Canon EF 17-40mm f/4L USM

Summary
Manufacturer	Canon
Model	EF 17-40mm f/4L USM
Mount	Canon EF
Marketed	2003 21 years ago
Optics
Zoom
Focal length	17-40mm
Zoom ratio	2.35×
Aperture	f/4.0-22.0
Closest focus	0.28m
Elements/Groups	12/9
Maximum magnification	0.240×
Negative size	35mm
Aperture blades	7
Coating	Multi coated
Optical diagram	Canon EF 17-40mm f/4L USM × Close
Features
Autofocus
Physical
Weight	475g
Length	97mm
Diameter	84mm
Filter thread	77.0mm
Misc
Link	https://global.canon/en/c-museum/product/ef373.html
Meta
Tags	l
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