The SMC Pentax-DA 16-45mm f4 is a standard zoom lens for DX format Pentax DSLR cameras. With a slightly wider starting point than most general purpose zooms, and a constant f4 maximum aperture, this is a bit of a step up from your average 18-55mm lens- and while it’s a bit larger, it’s nothing too dramatic. Light cosmetic wear, clean glass and good function. Includes hood.