Canon 8806A002 EF 17-40mm f4L SLR Camera Lens

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.

Focus Adjustment: Inner focusing system with USM

Closest Focusing Distance: 0.28m / 0.9 foot

Zoom System: Rotating Type

Filter Size: 77mm

Maximum Diameter x Length, Weight: 3.3" x 3.8", 1.1 pounds