The Quantaray MX AF lens for Minolta is an autofocus lens ideal for SLR and DSLR camera types. With a maximum aperture of f/4.0-5.6 across the 70 mm-210 mm zoom range, the Quantaray MX AF lens is best suited for medium-range distances and no further than 100 yards if clarity and detail are desired. The f/4.0-5.6 lens is value-priced for the novice or semi-professional photographer. This f/4.0-5.6 lens is light enough to carry around while traveling without weighing the photographer down. The barrel on this autofocus lens does not turn in order to zoom; rather, zoom is enabled by sliding the barrel. When not in use, this Quantaray MX AF lens should be stored in a dry place and within a hard case for maximum protection.