Canon EF 17-40mm f/4L USM
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.
Focal Length & Maximum Aperture: 17 - 40mm; 1:3.5-4.5Lens Construction: 13 elements in 10 groups
Diagonal Angle of View: 107 degrees 30' - 63 degrees 30'
Focus Adjustment: Inner focusing system, with focusing cam
Closest Focusing Distance: 0.24m / 0.79 ft.
Zoom System: Ring USM
Filter Size: 77mm
Max. Diam. x Length, Weight: 3.3" x 3.5", 13.6 oz. / 83.5 x 89.8mm, 385g
Lens Forum
Photo Samples
Reviews
Buy This Lens