Sigma's 70-300mm F4-5.6 DG Macro is a compact telephoto zoom lens. With a range that is useful for candid portraiture, capturing children playing in the backyard, amateur sports or even wildlife at the zoo, this lens is usually the lens that photographers reach for first. It's great on vacation for capturing scenic details or even groups of flowers in a garden. The Sigma 70-300mm offers a 4 to 1 zoom ratio in a compact lens that is easily carried in your camera bag or left on the camera as you travel; and the images are magnificent.This tele-macro zoom lens is capable of focusing down to 1:2 (half life-size) reproduction ratio at 300mm focal length. It also has a switch for changeover to macro photography at focal lengths between 200mm and 300mm. The lens materials used in this product are lead and arsenic free ecological glass.The improved DG lens design corrects for various aberrations. This lens is specially coated to get the best color balance while cutting down on ghosting caused by reflections from the digital image sensor.Macro photography with a 1:2 maximum close-up magnification at the 300mm focal lengthSwitch for changeover to macro photography at focal lengths between 200mm and 300mm with a maximum close-up magnification from 1:2.9 to 1:2Browse compatible Sony DSLR Cameras here.