Canon EF-S 10-22mm f/3.5-4.5 USM Lens

This exciting zoom lens provides ultra wide-angle coverage to the EOS 20D, 30D, 40D, 50D and Digital Rebel SLRs. Equivalent to a 16-35mm zoom, it offers excellent performance and optics designed from the ground-up for digital SLR use. Three Aspherical lens elements, plus a Super-UD element, assure image quality. Its ring-type USM means fast and silent AF along with full-time manual focus. It focuses as close as 9.5 inches.

Features:

• Excellent optical quality and true wide-angle coverage with select digital SLRs.
• Superior AF performance and speed, with full-time manual focus by simply turning ring.
  
• Close-focusing to 9.5 inches -- fill the frame with subjects as small as 3.6 x 5.4 inches.
  
• Relatively compact size and light weight for an ultra-wide zoom lens.
  
• Inner focusing system (no front element rotation); length doesn't change if zoomed.
  
• Circular aperture design -- natural highlights, even stopped down two stops.
  
• Electronic diaphragm -- manually-set apertures stay constant from f/4.5 thru f/22.
  
• EF-S lens mount -- exclusively for EOS 20D, 30D, 40D, 50D and Digital Rebel bodies.