The tamron 70 200mm f28 di ld if macro lens is a telephoto zoom lens that has a large maximum aperture of f28 which remains constant throughout the zoom range it also offers an excellent close focusing distance minimum of just 31 095 m throughout its entire zoom range with a maximum macro magnification ratio of 131 at f200mm when mounted on an aps c sensor size digital slr camera it provides a focal length equivalent of 112 320mm di digitally integrated design is a desig