Lenses for DSLR

Canon EF 17-40mm f/4L USM

Specifications

Specifications in detail

Optical Features / Specifications

  • Angle of View (Horizontal, vertical, diagonal)

    93° - 49°20', 70°30' - 34°, 104° - 57°30'

  • Lens Construction (Elements/Groups)

    12/9

  • Number of Diaphragm Blades

    7

  • Minimum Aperture

    22

  • Closest Focusing Distance (m)

    0.28

  • Maximum Magnification (x)

    0.24 (at 35mm)

  • AF Actuator

    USM¹

Accessories

  • Lens Cap
    E-77U / E-77II
  • Lens Hood

    EW-83E

  • Lens Case/Pouch

    -

  • Magnification with Extension Tube EF12 II

    0.83 - 0.32

  • Magnification with Extension Tube EF25 II

    1.02 - 0.70¹

Physical Specifications

  • Filter Diameter (mm)

    77

  • Max. Diameter x Length (mm)1

    83.5 x 96.8

  • Weight (g)

    500

¹ Mechanical full-time manual focusing built-in

¹ Only compatible at tele

  1. Lens dimensions when in retracted state