 "Canon lens - 50mm" " Canon 50mm 2515A003 Camera & Camcorder Lenses CDW.com
"Canon offers this standard lens featuring superb quality and portability. Two high-refraction lens elements and new Gaussian optics eliminate astigmatism and suppress astigmatic difference. Crisp images with little flare are obtained even at the maximum aperture." 
 "Canon EF 100mm f/2.8 USM"@en " Canon USM Medium telephoto macro prime lens for EOS SLR cameras at Crutchfield.com "@en
"Medium telephoto macro prime lens for Canon EOS SLR cameras"@en 
 General Brand Compatibility Canon Image Stabilization No Focal Length 100mm Maximum Aperture f/2.8 Weight 20.5 Parts Warranty 1 Year Labor Warranty 1 Year