The Pentax K100D has a sensor resolution of six megapixels, and accept lenses using the Pentax KAF lens mount. The stabilization mechanism - dubbed “Shake Reduction” - is undoubtedly the standout feature of this model. Focusing can be controlled automatically or manually, and uses a phase detection system with 11 points (nine of them cross-type) to determine focus. Images can be framed using a penta-mirror optical viewfinder, and reviewed on a 2.5″ LCD display with a resolution of 210,000 pixels.

A choice of program, aperture- and shutter-priority or manual exposure modes; 16-segment multi, center-weighted or spot metering; shutter speeds from 30 - 1/4000 second; user-selectable ISO sensitivity from 200 - 3200 equivalent, plus eight white balance modes including fully manual white balance let your creative juices flow. For fun snapshots, the K100D offers a range of automatic controls including eight scene modes and four Picture modes (the latter essentially being scene modes that have positions on the mode dial rather than being accessed through the LCD display). A five-mode flash strobe is also available, along with a two or twelve-second self timer.

A remarkable function is the digital preview, which enables you to check the depth of field on the monitor before capturing your image. In fact, you will already be taking a photo, but the difference is that the Pentax K100D will store it in the buffer, instead of instantly writing it onto the memory card. In practice, however, this function did not prove particularly handy; I much rather prefer a depth of field check in the viewfinder. Fortunately, this function is also available on the Pentax K100D!

To improve the image quality, Pentax have equipped their K100D with new algorithms, which should -among other things- help to reduce noise. Not that Pentax users had any reason to complain! Pentax even offer prospective users of a K100D the chance to work with ISO 3200; a unique feature in this class of DSLR cameras. The speed of the camera, which formed a major disadvantage of the Pentax *ist DS2, is another feature that promises improvement. The auto focus provides you with eleven focus points, nine of which are cross-type sensors.