The Tamron AF 28-200mm Super Zoom f/3.8-5.6 XR Di Aspherical IF Macro Lens is a very compact and lightweight zoom lens with a constant 1.6' minimum focus distance and a maximum magnification of 1:4. The remarkable achievements are brought about through XR (extra refractive index) glass. This highly popular lens has now been improved with the Di optical system, with improved multi-coating for digital SLR cameras as well as film cameras, further enhancing its ease of use and popularity.