 "Canon EF zoom lens 70-200mm" " Canon 70-200mm - 2578A002 Camera & Camcorder Lenses CDW.com
"High-performance, L-series telephoto zoom lens combining lightweight and compactness with an f/4 maximum aperture. Inner focusing and the ring USM enable quick and quiet autofocusing. Also, a circular polarizing filter can be attached and used without difficulty because the front lens element does not rotate during focusing. The tripod collar (sold separately) is the same one used with the EF 300mm f/4L USM." 
 "Canon EF 17-40mm f/4L USM"@en " Canon USM L series wide-angle zoom lens for EOS SLR cameras at Crutchfield.com "@en
"L series wide-angle zoom lens for Canon EOS SLR cameras"@en 
 General Brand Compatibility Canon Image Stabilization No Focal Length 17-40mm Maximum Aperture f/4 Weight 16.8 ounces Parts Warranty 1 Year Labor Warranty 1 Year