Adapted to the demands of digital SLR cameras (APS-C and full frame), this Tamron SP F/2.8 Telephoto Zoom lens, with 3XR glass elements, has 70 mm - 200 mm focal length. Moreover, the lens has a minumal focus length of 0.27 meters, and is able to fit 67 mm diameter filters. Additionally, it features both IF (internal focusing system) as well as auto focus.