Canon 17-40mm f4L USM EF Lens

A high-quality, wide-angle zoom for a variety of subjects.

The EF 17-40mm f/4L USM is an ultra wide-angle zoom lens that offers excellent image quality and a constant maximum aperture. Its compact, lightweight body makes it an ideal travelling companion
  • New Or Secondhand: New
  • Lens is suitable for: Canon EOS APS-C (EF-S) & Full Frame (EF)
  • Fitting: Canon EF/EFs
  • ZOOM
  • Wide ZOOM
  • Filter Size: 77mm

Product code: 49006 (4960999189949)

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Product Details

The EF 17-40mm f/4L USM is an ultra wide-angle zoom lens that offers excellent image quality and a constant maximum aperture. Its compact, lightweight body makes it an ideal travelling companion.

  • EF-Mount Lens/Full-Frame Format
  • Aperture Range: f/4 to f/22
  • One Super Ultra-Low Dispersion Element
  • Three Aspherical Element
  • Super Spectra Coating
  • Ring-Type Ultrasonic Motor AF System
  • Weather-Sealed Construction
  • Rounded 7-Blade Diaphragm

Ultra-wide or standard zoom

The EF 17-40mm f/4L USM acts as an ultra-wide angle zoom on film or full-frame digital EOS cameras. On DSLRs equipped with APS-C sized sensors it acts as a standard zoom, giving an angle of view equivalent to a 28-70mm lens on a full-frame camera.

Close focusing

Minimum focusing distance is just 28cm throughout the entire zoom range.

Superior optical performance

The EF17-40mm f/4L USM has 12 lens elements arranged in nine groups. Super Spectra coating ensures excellent colour balance and minimises ghosting and flare. To provide superb image quality over the complete 17-40mm zoom range the lens uses three aspheric elements. Super UD (Ultra-low Dispersion) glass prevents chromatic aberrations.

Ultrasonic focusing

A ring-type ultrasonic motor drives autofocus extremely quickly, and in near silence. Excellent holding torque ensures the point of focus is reached accurately, without overshooting. Furthermore, full-time manual override is available, making it possible to adjust focus without leaving AF mode.

Non-rotating front element

The front of the lens does not rotate, which makes using specialised filters, such as polarisers and graduates, easier. A drop-in gelatine-filter holder can be found at the back of the lens.

Smooth background blur

A virtually circular aperture diaphragm gives out of focus regions a softer, more uniform feel. Sharp foreground objects stand out against a smooth blurred background.

Weather resistant

Highly resistant to moisture and dust, the EF17-40mm f/4L USM is ideally suited for use in harsh environments. Environment friendly lead-free glass is used throughout its construction.

4.4
(952 reviews)

Product Reviews

4.4
based on 1847 ratings This score is based on all expert and user reviews that TestFreaks has collected for this product. Reviews and scores are collected from more than 30 countries but only reviews in selected languages are shown below.
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Quality construction, Lightweight, Strong construction, Sharp focus, Consistent output
Fredmiranda
Photodo

This is an exceptionally good lens and deserves it reputation, finding its place in most camera bags of professionals using Canon gear. The slightly warm colours produced by Canon L glass and the good contrast and control of other elements required for a nice lens are all there.

SLR Lens and Camera Reviews

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.

Images by William Castleman

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.

The Digital Picture

As indicated by the "ultra wide angle" designation, the 17-40mm focal length is ultra wide on a full-frame DSLR. Let's take a look at a focal length comparison.

Photodo

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.

ePHOTOzine

Gary Wolstenholme takes a look at this popular lightweight ultra-wide angle zoom lens.

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Canon

I got this lens to use with a full frame body and the results have been mixed. The 17mm wide angle is great for landscapes and the lens produces very good resolution too. However, the fringing (chromatic aberration) is far more noticeable than claimed by some of the typical reviews (which I did read...

Very

This is a fab lens, highly recommended, unless you really NEED something faster and much more expensive, but make no mistake - this is superb quality, and up right there with other Canon Pro lenses.

Clifton Cameras
Canon

As a beginner I have found myself being drawn to landscape photography and this lens is a great choice for that, with its wide lens making sure you capture everything. A great lens for a great price. I will get the 16-35mm f2.8 eventually but this great lens for a step in the right direction

Clifton Cameras
Very

Excellent lens, as expected for an L series lens, Very light

Canon

A great lens for travel, landscape and general use. I have used this in many situations from landscapes, large groups at weddings and property shots both indoors and outside, Really clear sharp images throughout the zoom range and F4 is great indoors, Excellent at a travel lens when on a crop sensor...

Clifton Cameras
Canon

I love the perspective I get with this at full wide angle, it’s amazing and so sharp in almost every situation, even low light. I just wish it had stabilisation built in.

Canon

I have had the lens a little while now and have found it a joy to use, colours clarity are all excellent as you would expect from Canon. Waiting for Ef to Rf adaptor so I can try it on my new R6

Due to Covid I have only tested this lens in my back garden and I am pleased to say it is excellent crisp clear pictures, simple to use.

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Canon 17-40mm f4L USM EF Lens

Product code: 49006 (4960999189949)

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