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Home  >  Canon EOS Lenses >  Item # CN1740LUSM (MFR# 8806A002)
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EF 17-40mm F/4 L USM Lens, With Canon 1-Year USA Warranty
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Canon EF 17-40mm F/4 L USM Lens, With Canon 1-Year USA Warranty

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Condition: Brand new, USA Warranty
17-40mm ultra-wide-angle zoom lens with f/4 maximum aperture for Canon SLR cameras 3 aspherical lens elements and super UD glass element create superior optics in all conditions

Features

  • Superb optical performance throughout the zoom range.
  • Fastest AF speed within its class (same as the EF16-35 f/2.8L USM)*
  • Highly dust and moisture resistant
  • 28cm minimum focusing distance at all focal lengths *as of January 2003


Ultra wide lens for analogue EOS SLR cameras
The EF17-40mm f/4L USM is an ultra wide angle Canon EF zoom lens meant for professional and high amateur SLR EOS camera users.

Standard zoom lens for digital EOS SLR cameras
While it is an excellent lens when used with an analogue SLR camera, the EF17-40mm f/4L USM is especially well suited for digital SLR cameras with an imaging sensor size smaller than the 35mm format. Indeed on such digital SLR cameras these focal lengths can give an angle of view approximately equivalent to that of a 28-70mm lens used on a 35mm camera, which makes it the ideal standard zoom lens.

Superior optical performance
The EF17-40mm f/4L USM has 12 lens elements arranged in 9 groups. Super Spectra Coating on the elements ensures excellent colour balance and minimises ghosting and flare. To provide superb image quality over a 17-40mm zoom range the lens uses three aspheric elements of two different types, while Super UD (Ultra-low Dispersion) glass is used to prevent the chromatic aberrations that often can degrade the subject edge clarity.

Extensive set of high-end features
Minimum focusing distance is just 28mm throughout the entire zoom range.

The Auto-focus works silently and quickly thanks to a fast central processing unit with an improved AF algorithm. You can override AF mode with manual focus should you wish.

Controlled by an electromagnetic diaphragm, the EF17-40mm f/4L USM's circular aperture can achieve a more attractive appearance to out of focus background areas in a picture.

The front of the lens does not rotate as you focus. This means, for example, that polarising filters still function effectively as you zoom in and out. At the rear of the lens there's a drop-in gelatin filter holder.

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.

Customer Reviews
Canon EF 17-40mm F/4 L USM Lens, With Canon 1-Year USA Warranty

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5 out of 5 stars   Excellent Lens For The Price
By Joseph (Monroe, LA) May 13, 2013
Review submitted for Canon EF 17-40mm F/4 L USM Lens, With Canon 1-Year USA Warranty (CN1740LUSM)
Verified Purchaser
Pros: Durable, Strong Construction, Consistent Output, Lightweight
Cons:
Other Comments: excellent wide angle when paired with a ff body
I recommend this product Yes, I recommend this product
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5 out of 5 stars   A lens for all seasons
By Great Dane (Weatherford, TX) March 20, 2013
Review submitted for Canon EF 17-40mm F/4 L USM Lens, With Canon 1-Year USA Warranty (CN1740LUSM)
Verified Purchaser
Pros: Lightweight, Fast / accurate auto-focus, Easily Interchangeable
Cons:
Other Comments: 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. Fine opportunities for creative "street photos" with artistic approaches and unique angles.
I recommend this product Yes, I recommend this product
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5 out of 5 stars   Perfect
By daryldivr (New Orleans, La.) March 14, 2013
Review submitted for Canon EF 17-40mm F/4 L USM Lens, With Canon 1-Year USA Warranty (CN1740LUSM)
Verified Purchaser
Pros: Fast / accurate auto-focus, Nice Bokeh, Rugged, Fast Accurate And Sharp, Strong Construction, Consistent Output, Durable, Easily Interchangeable
Cons: Poor in Low Light, Heavy
Other Comments: very fast. accurate. easy to use. heavy.
I recommend this product Yes, I recommend this product
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5 out of 5 stars   North to Alaska
By John (Lakewood, CA) September 16, 2011
Review submitted for Canon EF 17-40mm F/4 L USM Lens, With Canon 1-Year USA Warranty (CN1740LUSM)
Verified Purchaser
Pros: Lightweight, Consistent Output
Cons:
Other Comments: I took this lens to Alaska and it worked well for wide angle shots of the mountains and glaciers. I then used it as in a garden setting as a macro lens. It worked well and I was very pleased with the results.
I recommend this product Yes, I recommend this product
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5 out of 5 stars   very nice product
By linda (new york) April 05, 2011
Review submitted for Canon EF 17-40mm F/4 L USM Lens, With Canon 1-Year USA Warranty (CN1740LUSM)
Verified Purchaser
Pros: Easily Interchangeable, Durable, Consistent Output, Strong Construction, Fast / accurate auto-focus
Cons:
Other Comments: very nice.. even sharp under low light and low speed.
I recommend this product Yes, I recommend this product
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4 out of 5 stars   Good Lens for my use
By Rich (Pittsburgh,Pa) May 03, 2010
Review submitted for Canon EF 17-40mm F/4 L USM Lens, With Canon 1-Year USA Warranty (CN1740LUSM)
Verified Purchaser
Pros: Fast / accurate auto-focus, Durable, Easily Interchangeable, Strong Construction, Rugged
Cons: Heavy, OK-light for L series
Other Comments: Own EFS 17-85mm.Ok Lens but wanted a constant better optic.Lens still being tested with cropped sensor body.
I recommend this product Yes, I recommend this product
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