Canon EF 17-40mm f/4L USM Specifications
35MM FILM EQUIVALENT FOCAL LENGTH
Angle of view (horzntl, vertl, diagnl)
93° - 49°20', 70°30' - 34°, 104° - 57°30'
Lens construction (elements/groups)
12/9
No. of diaphragm blades
7
Minimum aperture
22
Closest focusing distance (m)
0.28
Maximum magnification (x)
0.24 (at 35mm)
IMAGE STABILIZER
AF actuator
USM¹
Filter diameter (mm)
77
Max. diameter x length (mm)
83.5 x 96.8
Weight (g)
500
Magnification - Extension Tube EF12 II
0.83 - 0.32
Magnification - Extension Tube EF25 II
1.02 - 0.70¹
Lens Cap
E-77U / E-77II
Lens hood
EW-83E
Hard case
-
Soft case
LP1319
G.F.HOLDER IV (HOOD IV*)
Extenders EF1.4x II and EF2x II
Not compatible
Footnote
¹ Mechanical full-time manual focusing built-in
¹ Only compatible at tele