Sigma 70-300mm f/4-5.6 DG Macro Telephoto Zoom Lens with Opteka 58mm UV Filter for Canon EOS SLR Cameras Including the 10D, 20D, 30D, 40D, 50D, Digital Rebel XT, XTi, XS, XSi, & T1i Designed for use with full frame digital SLR cameras. May also be used with smaller APS-c size sensors with a corresponding effective increase in focal length to about 100 to 450mm with most cameras Minimum focusing distance of 59 inches throughout the entire zoom range & a maximum magnification ratio of 1:2. Equipped with a switch that reduces the minimum focusing distance at 150mm to 95cm SLD (Special Low Dispersion) glass elements provide optimum color correction & sharpness throughout the entire zoom range A great all-around lens, its Macro ability and large zoom range make it a must have lens for advanced and novice photographers. Kit includes: Opteka 58mm UV Filter