Pentax has announced that there is a Remote Assistant 3 software that K10D owners can use to control the functions of the camera while tethered to a computer via a USB cable.
In studio photography, tethered shooting can be quite useful for providing instant feedback from the computer. The PCâ€™s monitor, for one, provides a larger display on which shots can be viewed immediately.
The Pentax Remote Assistant 3 can operate multiple connected cameras. It also offers Interval Mode, Timer Mode and Bulb Timer Mode.
The RA3 is for the Mac OS X only (versions 10.3 to 10.4.9). Check to see that your K10D has the firmware version 1.20 or later. It does not work with earlier firmware versions.