Canon EF 17-40mm f/4L USM Ultra Wide Angle Zoom Lens for Canon SLR Cameras
by Canon
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Category: Digital Camera
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Digital product summary information
Manufacturer: CanonModel: 8806A002
Product 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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Digital camera reviews of Canon EF 17-40mm f/4L USM Ultra Wide Angle Zoom Lens for Canon SLR Cameras
Digital camera Review: 10-22 vs 17-40
Summary: 5 Stars
I traded in my EF-S 10-22 for this one, realizing how often I switched back and forth between 10-22 and 24-70. I took some stats in fact, and it turns out I stay mostly between 17-35 range, and never really go any wider than 15-16 even with the 10-22. The wider range of 10-22 certainly gives you a lot of freedom, but I found it to be a bit too artificial due to the unavoidable barrel distortion.
Now, 10-22 is certainly a solidly built piece of glass, but 17-40 does deserve its L label and the red ring. It feels a little heavier than the 10-22, and the focus ring turns with sufficient weight (10-22 feels a little on the lighter side) you can actually fine-tune the focus with greater accuracy. Being an L-series lens, it comes conveniently with a lens pouch and hood.
Under darker conditions, the focus seems a little slower than my other faster lens, but even at f4, it takes crisp shots. I highly recommend this for anyone with a Canon dSLR. If you're planning on moving on to the 1:1 crop bodies (1d or 5d, a less expensive sibling coming out in October) 17-40 can be a good piece of glass to have, as you're going to have to let to of the 10-22 anyways.
I did have a chance to try the 16-35L, but at the smaller aperture range, the difference seems nominal, especially considering the price difference.
I use Canon EOS 20d and Elan 7, and they both pair up nicely with 17-40 4L.
More Canon EF 17-40mm f/4L USM Ultra Wide Angle Zoom Lens for Canon SLR Cameras reviews:
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Summary of Canon EF 17-40mm f/4L USM Ultra Wide Angle Zoom Lens for Canon SLR Cameras
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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