http://www.usa.canon.com/cusa/support/consumer/eos_slr_camera_systems/lenses/ef_17_40mm_f_4l_usm?pageKeyCode=writeReviewPage
EF 17-40mm f/4L USM
8940
Overview
A new and affordable L-series ultra-wide-angle zoom lens that's 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 Canon's 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.
Sample Image
MTF Charts
EF 17-40mm f/4L USM
4.6
5
45
45
Great lens
This is a great affordable L series lens. It is wide enough for a full frame or crop body. It is built like a tank and a very reliable lense @ f/4. No need for 2.8 if you use a flash or light your subject correctly.
January 2, 2013
Good Investment
Very sharp images low price, great build quality, and super fast autofocus. definitely would recommend this to a friend.
October 26, 2012
extremely happy!!
extremely sharp lens. light weight. easy to use. love it!
August 17, 2012
Excellent Lens
many of my shots utilize this fantastic lens. It is perfect for indoor gatherings and that's when I use it the most. All of the photos I have takken with it are, in my opinion, suburb.
June 23, 2012
Feedback
Cameras
Windows Support
Product Advisories
Where To Buy
Find a Retail Store
