Canon EF 17-40mm F4.0L USM Specifications


Side view of the Canon EF 17-40mm F4.0L USM

Photo © 2012 by



Compatibility: analog/digital

Diagonal Angle of View: 104° - 57.3°

Maximum Magnification: 1:4.2

Minimum Aperture: F22

Number of Aperture Blades: 7

Iris Pattern: rounded (Ken Rockwell states polygonal)

Minimum Distance: 28cm

Filter Thread: 77mm

Maximum Diameter: 84mm

Length: 97mm

Weight: 500g

Focus Type: Ring-USM, internal focus mechanism, parfocal

Full Focus Throw: 120°

Dual Pixel CMOS AF: supported

Zoom Type: rotary

E-TTL II Distance Information: yes

IR Capability: reported by Lens Play, IR Forum postings confirm as well as deny

Lens Hood: EW-83E

Produced: 2003

Tests: PhotoZone tested on EOS 350D, 50D and 5D MKII; DxO Labs; SLRgear; Photodo; Popular Photography

Popular Photography Measurements: 17.58-39.66mm F4.14-3.98 at 1:8.7-1:3.64

Additional Information:

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