Canon EF 17-40mm f/4.0L USM

Specifications
Principal specifications
Lens type Zoom lens
Max Format size 35mm FF
Focal length 17 – 40 mm
Image stabilisation No
Lens mount Canon EF
Aperture
Maximum aperture F4.0
Minimum aperture F22.0
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 x
Autofocus Yes
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
Filter notes Rear drop-in gelatin filter holder
Hood product code EW-83E
Tripod collar No
Optional accessories Soft Case LP1319

Review
dpreview: 3.38 of 5 (8 users)
Fredmiranda: 9 of 10 (505 users)