The SMCP-DA 16-45mm f/4 ED AL Lens is the perfect complement to a digital Pentax SLR camera. This lens covers the popular most basic zoom range of wide-angle to short telelphoto, which is most associated with a standard zoom lens today. The lens provides a focal length which is equivalent to 24-67mm in 35mm terms.

Pentax's DA series feature a "Quick-Shift Focus System" which allows an instant switch from autofocus to manual focus with a slight twist of the focus ring. Coupled with simple, functional design, and the elimination of the aperture ring, the camera's operability is significantly improved.

The image circle in DA-series lenses is designed to perfectly match the 23.5 x 15.7mm size of the CCD image sensor used in Pentax digital SLRs, and thus will not cover the full frame of a 35mm camera. The design contributes to dramatic size and weight reduction, not to mention production costs.