This pro-caliber, standard-range, bright digital zoom ($1030, street) is the second Pentax to use sonic-wave autofocusing for very smooth and quiet AF. It works with newer Pentax bodies that accept the KAF2 mount. On older bodies such as the K100, it defers to the noisier, body-housed AF motor. A 24-76mm equivalent, it has three aspheric and two optically pure, low-dispersion glass elements. Special lens coatings resist dust and smudges, and suppress ghosting off the sensor.