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

Model #8806A002

USA Version
Canon 8806a002 1
Canon 8806a002 1
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Weight 1.05 lb (476 g)
Filter thread 77 mm
Dimensions (dxl) Approx. 3.3 x 3.8" (8.38 x 9.65 cm)


Magnification 0.24x
Camera mount type Canon EF
Groups/elements 9/12
Aperture Maximum: f/4
Minimum: f/22
Minimum focus distance 11.02" (28 cm)
Format compatibility 35mm Film / Full-Frame Digital Sensor
Canon (APS-C)
Maximum reproduction ratio 1:4.1
Diaphragm blades 7
Focal length 17 - 40 mm
Angle of view 104° - 57°


Tripod collar No
Autofocus Yes
Image stabilization No
Expert Reviews
Camera labs.32824899
1 July 2007

The Canon EF 17-40mm may deliver spectacular ultra-wide angle coverage when fitted to a full-frame body like the EOS 5D, but offers a more normal, general-purpose range when mounted on cropped bodies like the EOS 30D or 400D / XTi.

  • +

    Canon 'L' build and optical quality, Fast and quiet USM focusing motor, Constant f4 aperture throughout range, Will also work on full-frame body

  • -

    Shorter zoom range than kit lens, No IS (although not particularly necessary), Overkill if not considering full-frame in future, Canon EF-S 17-85mm more flexible for most

Slr lens and camera reviews.33034498
6 June 2009

Canon EF 17-40mm f/4L USM is one of Canon's professional grade lenses, first released in May of 2003. It is one of only four ultra wide zoom lenses Canon manufactures at this time.

24 November 2008

Gary Wolstenholme takes a look at this popular lightweight ultra-wide angle zoom lens, which has a constant aperture of f/4, an Ultrasonic focusing motor and sealing against the elements.

  • +

    Superb performance in the centre throughout the range, Well built, Lightweight

  • -

    Sudden softness in the corners may disturb full-frame SLR users, Distortion difficult to correct entirely at 17mm, Falloff at 17mm

The digital picture.32823291
26 August 2007

Is the Canon EF 17-40mm f/4L USM Lens right for you? Learn all you need to know about the Canon EF 17-40mm f/4L USM Lens in's review!

Photo net.32822890
7 June 2007

It isn't lighter than the 16-35/2.8L. It isn't better quality than the 16-35/2.8L. It isn't dramatically wide on the small sensor cameras. However, if you want a high quality wide-angle zoom with a medium weight and a medium aperture, the 17-40/4L is an excellent value.

Images by william castleman.34355705
26 May 2008

If you shoot wide angle, full frame photographs with Canon cameras stopped down at f/8 and beyond, the EF 17-40mm f/4L lens is an outstanding lens. Contrast and sharpness are greatest at the wide end (20 and 24mm) of the zoom range and approach or exceed those of quality prime lenses.

User Reviews
B h photo.32817553
12 January 2016

Purchased this lens to use with my Canon 6D and while it may not have that last 1mm of focal width or the step up quality of the f/2.8, for the relative price, it's pretty spectacular.

  • +

    Consistent Output, Easily Interchangeable, Fast / accurate auto-focus

  • -

    Difficult to Clean

5 June 2015

This lens is well worth the price and I hate paying high prices for things. I would give this lens a 9/10.

  • +

    Great detail and color in photos really can't ask for more here. I am a novice in the full frame camera world but I have to say this lens does everything I ask of it.

  • -

    Slow focus time and sometimes the lens can't focus at all if what you are looking at lacks enough detail to get the right sharpness. Zoom is very small and basic but decent for close ups.

15 April 2014

I use this lens for shooting abandoned buildings, so I can more get the scope of the place I'm shooting. THe only thing to keep in mind is that this lens is an f4, so there are some speed and low light issues, but if you're using strobes then it's not a problem.

  • +

    Strong Construction

  • -

    Poor in Low Light

3 April 2014

The Canon EF 17-40mm USM is simply a must have for Landscape photographers. This lens is perfect for those who want to upgrade to a professional quality lens without bearing the high costs associated with many of Canon's other lenses. Overall, I highly recommend this product.

  • +

    Quality of the lensPrice

  • -

    Weight of the lens

3 June 2014

I have owned this for 2 years now and I have loved every second of it. It was my first L series lens and was my only lens for a while. You just can't beat the quality at the price point. Focusing is silent and fast, build quality is great.

  • +

    Fast auto-focus, Superior build quality, Super-sharp images, lightweight

5 February 2015

My 18-55mm 3.5-5.6 kit lens broke, so i decided if i was going to replace it, i was gonna do it right. This was an incredible upgrade. The increase in sharpness was very noticeable. The quality of the video i shot jumped up immensely. I couldn't be more satisfied with it, especially for the price.

10 July 2014

Love this lens. I needed a higher quality wide angle lens that the kit EF-S lens that came with my Crop camera as I knew I was going to go FF eventually. The kit was slow to focus and the images were just not that sharp. Once I put the 17-40 L on my cam body I knew I had the right lens.

Review buydig com.33956271
20 March 2013

Great for landscapes, sunrises, and sunsets - particularly in combination with graduated neutral density filters to balance exposure of land and sky. Amazing for indoor room photos - a must for any Realtor. Superior for architects' pictures of structures.

  • +

    Lightweight, Fast / accurate auto-focus, Easily Interchangeable

17 January 2012

I own this lens for 3 years. It is simply great on crop. Dust and Rain is not a problem. Light weight make it possible for camera to be on your shoulders all the time in bike tours!

  • +

    Build like a tank. Great lens for travel. You should try hard to broke it! Lowest weight for L lenses. Cool for APS-C.

  • -

    Distortion on full frame. My copy isn't sharp at corners (not a problem on crop)

Nebraska furniture mart.34225129
6 August 2011

The only thing I would comment on is that there is not enough "blur" for some portraits, but I knew that when I bought it. It produces great pictures! The clarity is wonderful!

  • +

    Easy To Use, Good price value, High quality pictures, Quality Construction

Product Highlights
  • Compatible with All Canon DSLR Formats
  • L-Series Lens - The Best Canon Makes
  • Super Wide Angle Zoom Lens
  • For Film or Digital SLR Cameras
  • Uses 3 Aspherical Lens Elements
  • Uses Super UD Glass
  • Water and Dust Resistant
  • Internal Zooming and Focusing
  • Circular Aperture Diaphragm
  • Accepts 77mm Filters
Average Expert Score
Average User Score
In The Box
  • Canon EF 17-40mm f/4L USM Lens
  • E-77 II 77mm Lens Cap
  • Lens Dust Cap E (Rear)
  • EW-83E Lens Hood
  • Lens Case LP1319
  • Limited 1-Year Warranty
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