Lens
Clens
EF 17-40mm f/4L USM
Full-frame zoom · 77mm filter · 475g
Focal length
17–40mm
Max Aperture
f/4
Weight
475g
Filter Thread
77mm
Min Focus Distance
28cm
Weather Sealed
Yes
Mount: Canon Ef — compatible with all Canon Ef-mount bodies.
Groups
9
AF Motor
Ring Usm
Elements
12
Weight
475g
Filter Thread
77mm
Length mm
96.8
Model Code
EF17-40MM-F4L-USM
Stabilized
No
Diameter mm
83.5
Max Aperture
f/4
Min Aperture
f/22
Min Focus Distance
28cm
Weather Sealed
Yes
Aperture Blades
7
Introduced
2003
Focal Length (Max)
40mm
Focal Length (Min)
17mm
Max Magnification
0.24