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

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

About this item

  • Brand: Canon
  • UPC: 013803028058
  • Weight: 1.73
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About this item

Important Made in USA Origin Disclaimer: For certain items sold by Walmart on Walmart.com, the displayed country of origin information may not be accurate or consistent with manufacturer information. For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information.
The Canon EF 17-40mm f/4 L USM is an affordable L-series ultra-wide-angle zoom lens thats ideal for both film and digital SLRs. Features three Aspherical lens elements and one Super UD (Ultra-low Dispersion) glass element. Focuses as close as 11 inches (0.28m), and offers both full-time manual focus and a ring-type USM for fast and silent AF. It has a constant f/4 maximum aperture, and offers the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters. Finally, it offers weather-resistant construction similar to other high-end L-series lenses.

About this item

Important Made in USA Origin Disclaimer: For certain items sold by Walmart on Walmart.com, the displayed country of origin information may not be accurate or consistent with manufacturer information. For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information.

The Canon EF 17-40mm f/4 L USM is an affordable L-series ultra-wide-angle zoom lens thats ideal for both film and digital SLRs. Features three Aspherical lens elements and one Super UD (Ultra-low Dispersion) glass element. Focuses as close as 11 inches (0.28m), and offers both full-time manual focus and a ring-type USM for fast and silent AF. It has a constant f/4 maximum aperture, and offers the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters. Finally, it offers weather-resistant construction similar to other high-end L-series lenses.

Canon EF 17-40mm f/4 L USM Zoom Lens
High-performance, ultra-wide zoom. The Canon EF 17-40mm f/4 L USM is an affordable L-series ultra-wide-angle zoom lens thats ideal for both film and digital SLRs. Superior optics are assured by the use of three Aspherical lens elements, in addition to a Super UD (Ultra-low Dispersion) glass element. Optical coatings are optimized for use with digital cameras. This lens focuses as close as 11 inches (0.28m), and offers both Canons full-time manual focus and a powerful ring-type USM for fast and silent AF. It has a constant f/4 maximum aperture, and offers the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters. Finally, it offers weather-resistant construction similar to other high-end L-series lenses.


Key Features:
Ultrasonic Motor (USM)
Instead of large noisy drive trains powered by conventional motors, Canon USM lenses employ the minute electronic vibrations created by piezoelectric ceramic elements. The focusing action of the lens is fast and quiet, with virtually instantaneous stops and starts. USM lenses also draw minimal power from the camera, ensuring longer battery life. Full-Time Manual Focus
This lens is equipped with a ring-type USM, which allows full-time manual focus in AF mode. This means you can manually fine-tune focusing as soon as autofocus is complete, without having to switch to manual focusing mode. Aspherical Elements
Wide-angle lenses and fast normal-focal-length lenses often suffer from spherical aberration. When the light rays coming through the center of the lens do not converge at the same point as light rays coming through the lens edge, the image appears blurred because there is no sharp point of focus. Canons Aspherical elements use a varying curved surface to ensure that the entire image plane appears focused. Aspherical optics also help to correct curvilinear distortion as one might find in ultra wide-angle lenses. Super UD Glass Element
Canons Super UD (Ultra Low Dispersion) glass element significantly reduces chromatic abberation, which often appears in photographs as color fringing at the edges of objects. Dust and Water-Resistant Construction
L-series EF lenses are highly dust- and water-resistant thanks to rubber seals at the switch panels, exterior seams, drop-in filter compartments and lens mounts. Moving parts, such as the focusing ring and switches, are also designed to keep out environmental contaminants, providing reliable performance under harsh conditions. Circular Aperture
Canon lenses featuring circular aperture diaphragms employ curved blades to create a smoothly rounded opening as the lens is stopped down. As a result, out-of-focus background highlights are rendered as natural-looking rounded shapes rather than as distracting polygons. These lenses deliver smooth, consistent stop-down action (even at 10 fps), near-silent operation and excellent optical characteristics. Inner Focusing
An inner focusing lens has the focusing lens group(s) in front of the diaphragm, allowing for compact optical systems that produce faster AF. And because the front of the lens does not rotate to focus, filter orientation remains constant.

Specifications

Camera Lens Type: Telephoto Zoom Lens
Focal Length: 40 Millimeters
Optical Zoom: 2.4x
Lens Type: Telephoto Zoom Lens
Mount Type: Canon EF
Diameter: 77 Millimeters
Model: 8806A002
Brand: Canon
Compatible Brands: Canon
Magnification: 0.24
Maximum Aperture: 4
Lens Coating: Super Spectra coating
Focus Type: Automatic, manual
Lens Diameter: 77 Millimeters
Condition: New
Compatible Devices: Digital SLR
Manufacturer Part Number: 8806A002
Color: Black
Accessories Included: Dust cap, lens cap
Minimum Aperture: 4
Assembled Product Dimensions (L x W x H): 107.00 x 107.00 x 144.00 Inches
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Customer Reviews

Customer Reviews | 60 reviews | 4.6 out of 5

4.5 stars

60 reviews | 4.6 out of 5

4.5 stars

60 reviews | 4.6 out of 5

88%
Would recommend to a friend
5 stars
48
4 stars
5
3 stars
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2 stars
5
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1-5 of 60 total reviews
88%
Would recommend to a friend

Age

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Superb Glass
11/8/2009

Customer review by ronin

5.0 stars 11/8/2009 by ronin
by ronin

This lens is an all-around excellent value. The only drawback is that I cannot give it a 100% rating on sharpness, as it falls off slightly at higher f-stops. However, with a little work one can still get incredible shots that are sharp enough for professional results. Having said that, I'd definitely rate sharpness at 95% or higher. When I purchased this lens, I was concerned about vignetting, as I heard others report issues with this lens at 17mm. I'm happy to report that I have not had this problem with APS-C sensors. It may have issues on full-frame sensors, but it would not be very much. The lens is a winner in all other categories: Color is superb; its USM motor is quick and quiet; the build quality is nothing less than what one would expect from Canon "L" glass; and the price is very good compared to the overall performance of the lens. When it comes to wide-angle shooting in a variety of conditions, I found that this lens works brilliantly on my 1D. It'll be in my kit bag for a long time.

ronin
Seattle
Would recommend to a friend? Yes
Affordable high quality landscape lens
6/3/2014

Customer review by PhotoDoc

5.0 stars 6/3/2014 by PhotoDoc
by PhotoDoc

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. It is a little soft wide open in the corners, but that is expected with an ultra wide lens. It can easily still be used wide open without loss of image quality. The distortion is well controlled and what remains can be corrected easily in LR. I think it has the perfect amount of distortion that can either be used as an advantage or corrected. One of the things that attracted me to the lens was the weight or how light it is. When you hike in the woods every ounce counts. Comparing it to the 16-35 it is significantly lighter. The close focusing distance has made the f/4 max aperture a non issues outdoors with depth of field. The extra stop could be helpful for wedding or indoor shooting. If you are doing outdoor shooting and want ultra wide angle this is a great lens.

PhotoDoc
Cincinnati, OH
Would recommend to a friend? Yes
Inexpensive Trick
7/17/2013

Customer review by thetechhimself

5.0 stars 7/17/2013 by thetechhimself
by thetechhimself

After reading an article about what lenses to carry I noticed a pattern regarding my shooting habits and the habits of the author, I am constantly pushing the wide side of my kit lens (18-55) when I had my crop frame for those get everyone in the picture or get the whole landscape shots. Recently moved to full frame and decided I'd pick up a 17-40 and use my 50mm nifty (1.8) to cover slightly tighter but shallow DOF. Can't say I'm unhappy with the lens. Slight distortion which I noticed even with my kit lens, simply put any zoom lens will give you some distortion of images which require post processing, but no complaints outside of the ordinary like another review recently posted. Definately a must have, you need your fast prime, your wide, maybe your regular zoom, and your telephoto something. Fits the bill without as large of a bill as the 16-35 2.8 variant. Cons: No IS at F4. At F4 even with my 5DIII, it could use it in low light, I can see where the 2.8 would be nice but I can't justify the price difference for it.

thetechhimself
San Jose, CA
Would recommend to a friend? Yes
Great value for the buck!
9/27/2016

Customer review by jazzman

5.0 stars 9/27/2016 by jazzman
by jazzman

Was looking for a used 16-35 mm zoom for shooting landscapes and came across this lens. It may not be as fast but it is as sharp and just as reliable. Depending on your needs, this is an excellent lens either as your go-to lens or as a back-up.

jazzman
New York, NY, United States
Would recommend to a friend? Yes
Great Lens... But...
3/6/2009

Customer review by DUSCRAFT

5.0 stars 3/6/2009 by DUSCRAFT
by DUSCRAFT

Okay, I gave this lens a 5 Overall Rating and yet I say "But..." in my title... Hear me out... This is a great lens if you are going by sharp images at a tighter zoom and for color capture. I've used this lens for a few of my newer shoots and have been very happy with the results. The only problems with this lens is the strong vignette that occurs around the outer edges of the image and jumpy autofocus. The vignette is really only a problem when the lens is at widest. There is not a lot of light fall off accompanied by the strong vignette. This is a great thing. The only downside is the stretched appearance of the photos edges. I don't feel that the auto focus is as superior as some of the other L lenses in the lineup. But apart from these two minor glitches I would have to say that this lens is a great buy for the dollar. I'm very happy with it and have captured some beautiful images with it. I would recommend this lens to anyone who is doing wide landscapes as well as fashion (if you keep to the 40mm side of the zoom). Great stuff as usual.

DUSCRAFT
Southern Region of Texas
Would recommend to a friend? Yes
1-5 of 60 total reviews See all
1-5 of 60 reviews

Customer Reviews | 60 reviews | 4.6 out of 5

Customer Reviews

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Product warranty:  1 year CANON USA Warranty See details

Warranty Information: 1 year CANON USA Warranty
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