Canon 50-200mm f/3.5-4.5 L EF-Mount Lens {58} at KEH Camera
Canon EF 50-200mm f/3.5~5.6L & 50-200mm f/4.5~5.6 AFD Zoom Lens - Index Page
Amazon.com : Sigma 50-200mm f/4.0-5.6 DC IF SLD Optical Stabilized (OS) Lens with Hyper Sonic Motor (HSM) for Canon Digital SLR Cameras : Camera Lenses : Electronics
Amazon.com : Canon EF 200mm f/2.8L II USM Telephoto Fixed Lens for Canon SLR Cameras : Camera Lenses : Electronics