Canon EF 17-40mm f/4L USM Specifications

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)

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 III (hood III*)

NC

G.F.Holder IV (hood IV*)

(0)

Extenders EF1.4x II and EF2x II

Not compatible

Footnote

¹ Mechanical full-time manual focusing built-in

¹ Only compatible at tele