| Canon EF 17-40mm f/4L USM Ultra Wide Angle Zoom Lens for Canon SLR Cameras |  | Brand: Canon
Category: Photography
List Price: $1,200.00
Buy New: $633.99
You Save: $566.01 (47%)
New (30) Used (5) from $580.00
Rating:  114 reviews
Media: Electronics
Autographed: No
Memorabilia: No
Optical Zoom: 2.4
Maximum Focal Length: 40
Minimum Focal Length: 17
Shipping Weight (lbs): 1.1
Dimensions (in): 7.2 x 5.4 x 5.2
all-glass-optical
MPN: 8806A002
Model: 8806A002
UPC: 013803028058
EAN: 0013803028058
ASIN: B00009R6WO
Availability: Usually ships in 1-2 business days
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| Features:
| • | 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 | | • | Powerful ring-type ultra-sonic monitor (USM) produces fast and silent autofocusing | | • | Focuses as close as 11 inches; supports screw-in 77mm filters or up to 3 gel filters | | • | Weather-resistant construction; measures 3.3 inches in diameter; 1-year warranty |
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Product Description
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.While it is an excellent lens when used with an analog 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.The EF17-40mm f/4L USM has 12 lens elements arranged in 9 groups. Super Spectra Coating on the elements ensures excellent color balance and minimizes 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.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 polarizing 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.
Amazon.com Product Description
Broaden your perspective with the Canon EF 17-40mm ultra-wide-angle zoom lens. Ideal for both film and digital SLR cameras, the lens offers three aspherical lens elements in addition to a Super UD (ultra-low dispersion) glass element, creating superior optics in all conditions. In addition, the lens focuses as close as 11 inches (0.28mm), and offers both Canon's full-time manual focus and a powerful ring-type ultra-sonic monitor (USM) that produces fast and silent autofocus. Other features include a constant f/4 maximum aperture, the choice of screw-in 77mm filters or a holder in the rear of the lens for up to three gel filters, and optical coatings optimized for use with digital cameras. Boasting weather-resistant construction similar to other high-end L-series cameras, the lens carries a one-year warranty. - Focal length: 17-40mm
- Maximum aperture: 1:4
- Lens construction: 12 elements in 9 groups
- Diagonal angle of view: 104 to 57 degrees (at 30 feet)
- Focus adjustment: Inner focusing system with USM
- Closest focusing distance: 0.9 feet
- Zoom system: Rotating type
- Filter size: 77mm
- Dimensions: 3.3 inches in diameter, 3.8 inches long
- Weight: 1.1 pounds
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| Customer Reviews: Read 109 more reviews...
 Amazing November 17, 2008
James S. Hafner (Austin, TX)
This lens is amazingly sharp and well-built. As a wedding photographer, I would highly recommend it. It is gorgeously wide, especially on a full-frame body like the 5D. Buy this lens!
fantastic lens October 26, 2008
Piotr Maczka
Even 2 years ago the 17-40 L Canon lens was reserved for professional photographers because of its high price. Now it became available also for amatours. It's an amazing lens. Any picture taken with it its just fantastic. The colors, the sharpness, the quality its just beyond other lenses. "L" form canon holds its quality. I highly reccomend this lens for all photographers for whom taking pictures is more than just a hobby. IT'S DEFINITELY WORTH ITS PRICE!!!
An excellent lens September 22, 2008
Susannah H. Moore
This lens seems sharp at all distances and apertures. We are very pleased with it.
Now, THIS is a lens! September 1, 2008
Rugersix (SAN FRANCISCO, CA USA)
0 out of 1 found this review helpful
No plastic grinding against plastic when you focus this thing. Feels just like my Fujinon lens I use on my TV news camera. Pro gear. Want some? Pay up.
Great Lens July 7, 2008
J. Wong (Northridge,Calif.)
2 out of 6 found this review helpful
I bought this with my Canon 30D. This is a great lens and L series is the best. I have mostly L lens because the quality is worth the money.
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