The Sigma 500mm f/4 DG OS HSM Sport is a super telephoto lens produced since 2016 compatible with Sigma, Nikon and Canon mounts. Among the optical characteristics there is a focal length of 500 millimeters with a field angle of 5 degrees and a maximum aperture of f/4. As for the lenses, the lens is equipped with 16 elements divided into 11 groups with 9 diaphragm blades. Focusing occurs with a Ring-USM ultrasonic AF motor with a minimum focusing distance of 3.5 meters and a reproduction ratio of 0.15x. the Sigma 500mm f/4 DG OS HSM Sport lens features internal AF and Full Time MF. Image stabilization is incorporated into the lens as well as tropicalization which is present. From a construction point of view, this lens is equipped with a tripod ring, supplied lens hood and compatibility with multipliers. The specific weight of the Sigma 500mm f/4 DG OS HSM Sport is equal to 3310 grams. The product is equipped with a dust protection barrel and a carbon fiber lens hood which makes the camera body protected from any type of external aggression. Spherical and chromatic aberrations are minimized thanks to the presence of two FLD optical glass lenses and one SLD optical glass lens. Ideal for: the Sigma 500mm f/4 DG OS HSM Sport lens, thanks to its technical characteristics, is perfect for professional photographers who love taking photos of moving subjects. the lens is ideal for different types of sports photography and for shooting different subjects such as animals, moving people and vehicles but also for portraits.