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Canon EF 17-40mm f/4L USM
Announced: Feb 27, 2003Principal specifications
Lens type
Zoom lens
Max Format size
35mm FF
Focal length
17–40 mm
Image stabilization
No
Lens mount
Canon EF
Aperture
Maximum aperture
F4
Minimum aperture
F22
Aperture ring
No
Number of diaphragm blades
7
Optics
Elements
12
Groups
9
Special elements / coatings
Super Spectra coatings
Focus
Minimum focus
0.28 m (11.02″)
Maximum magnification
0.24×
Autofocus
Yes
Motor type
Ultrasonic
Full time manual
Yes
Focus method
Internal
Distance scale
Yes
DoF scale
Yes
Physical
Weight
500 g (1.10 lb)
Diameter
84 mm (3.29″)
Length
97 mm (3.81″)
Materials
Metal barrel, metal mount
Sealing
Yes
Colour
Black
Zoom method
Rotary (internal)
Power zoom
No
Zoom lock
No
Filter thread
77 mm
Hood product code
EW-83E
Tripod collar
No
Optional accessories
Soft Case LP1319