The iOptron 1.2MP iGuider 1 Autoguider Camera is used during astrophotography sessions to help your computer keep your mount tracking a subject with a high degree of accuracy during a long night of imaging. It is outfitted with a 1280 x 960 1.2MP 1/3" sensor that produces 6.44 arc sec resolution when coupled with its companion iGuide mini guide scope. The camera tethers to your computer running ASCOM planetarium software via the included USB cable. Please note that while it is ASCOM compliant the iGuider doesn't support ST-4 guiding.