Canon EF 17-40mm f/4L USM

Placeholder
$749 - $849
17-40 mm
autofocus 2.4x zoom lens
f/4
fixed aperture
  • Canon L Series Professional
  • Canon USM Built-in focus motor

reviewswhat are people saying

"Great coverage, lightweight and affordable."

bhphotovideo.com

"The lens is certainly fast enough for wide angle work."

bhphotovideo.com

"Too bad it does not go beyond 40mm."

bhphotovideo.com

compatibilitywith digital cameras

Pros

The Canon EF 17-40mm f/4L USM vs other Digital camera lenses

Auto focus Supports autofocus Help
Easier to use
Length Quite short Help
97 mm
Weight Very light Help
475 g
Fixed aperture Fixed aperture Help
The same maximum aperture at all focal lengths
Min focal length Great wide angle lens Help
17 mm

Cons

The Canon EF 17-40mm f/4L USM vs other Digital camera lenses

Aperture Narrow aperture Help
f/4
Max focal length Poor telephoto lens Help
40 mm
Image stabilization No image stabilization Help
Risk of blur
Prime lens Zoom lens Help
Typically not as sharp as prime lenses

Specifications

General

Min focal length
Help
17 mm
Max focal length
Help
40 mm
below average below average
Zoom range
Help
2.4x
Magnification
Help
1:4.2 (0.2)

Aperture

Wide maximum
Help
f/4
below average below average
Wide minimum
Help
f/22
Tele maximum
Help
f/4
Tele minimum
Help
f/22

Features

Auto focus
Help
Yes
above average above average
Focus motor
Help
Canon USM
Image stabilization
Help
None
Fisheye
Help
No
Tilt-shift
Help
No

Form factor

Lens mount
Help
Canon EF (Full-frame)
Length
Help
97 mm
Diameter
Help
84 mm
Filter size
Help
Unknown
Weight
Help
475 g

Angle of view

Wide horizontal
Help
93.3°
above average above average
Telephoto horizontal
Help
48.5°
Wide vertical
Help
70.4°
above average above average
Telephoto vertical
Help
33.4°
Wide diagonal
Help
103.7°
above average above average
Telephoto diagonal
Help
56.8°

Angle of view (On Canon EF-S APS-C 1.5x crop cameras)

Wide horizontal
Help
69.5°
Telephoto horizontal
Help
32.9°
Wide vertical
Help
49.8°
Telephoto vertical
Help
22.3°
Wide diagonal
Help
79.7°
Telephoto diagonal
Help
39.1°

Competitors

DiscussionWhat do you think about the Canon EF 17-40mm f/4L USM lens?

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Showing 1 comments

Digital Moment Studios (3:43 AM, December 22, 2010)
Very solid lens. Handles critical architectural work very well above 20mm. @F4, it could have been faster, but then it would not be as cost effective... I use nearly every day, clients love the files from the 17-40mm, reproduces well in print.