Tamron Tele Macro 1:4 AF 100-300mm 1:5-6.3 Lens is a zoom lens designed for Sony/Minolta A-mount SLR cameras. It has a maximum aperture of f/6.3 and is part of the Tamron AF series. The lens is ideal for macro/close-up photography and has a focal length range of 100-300mm. It is compatible with film camera technology and has a mount for A-mount cameras.