The Sigma 500mm f4.5 EX DG Sony/Minolta fit lens is a long telephoto lens with a fast maximum aperture. It features a super multi-layer coating, which optimises the characteristics of digital SLR cameras. A versatile, fast aperture telephoto lens for both digital and film SLR cameras, the Sigma 500mm features two ELD glass elements that reduce chromatic aberration to a minimum and also ensure sharp, quality images of high contrast.This is an ideal lens for sports, wildlife and action photographers, when getting in close from a distance is essential.