Canon 17-40mm f/4L EF Ultra Wide Angle

Brand: Canon

Features:

• 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

Platform: Not Machine Specific

Publisher: Canon

Details: 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.

Package Dimensions: 7.2 x 5.5 x 5.4 inches