EF 70-300mm f/4-5.6 IS USM telephoto zoom lens * Image Stabilization allows in-focus shots with longer exposure times (up to three stops slower shutter speed) * Micro Ultrasonic Motor for fast autofocus * compatible with all Canon EOS SLR cameras * minimum focus distance: 4.9 feet * lens is 5-13/16 long, 3 in diameter * more info

Tamron now offers a lightweight, compact, high-image-quality telephoto zoom lens with macro capability of 1: 2 that can be used with digital cameras. This new lens is a Di type lens using an optical system with improved multi-coating designed to function with digital SLR cameras as well as film cameras.With this 70-300mm telephoto zoom lens, flipping a macro switch in the focal length range of 180mm to 300mm obtains a maximum magnification ratio of 1: 2 at a minimum focus distance as short as 37.4, enabling close-up shots of flowers, insects, and other objects that normally require the use of a specially designed macro lens. Moreover, this is a zoom lens that casually offers the distant capture and foreshortening effect pleasures of the 300mm ultra-telephoto world. more info

75-300mm f/4-5.6 III EF telephoto lens * effective focal length: * 75-300mm with 35mm film or full-frame sensor digital cameras * 120-480mm with APS-C sensor Canon cameras * compatible with all Canon autofocus film and digital SLR cameras * Micro USM (Ultrasonic Motor) * constructed of 13 elements in 9 groups * lens is 5-3/8 long, 2-13/16 in diameter * more info