StarShoot AutoGuider
-Finally, an easy-to-use, affordable autoguider for long-exposure   astrophotography
-Uses a 1/2" format 1.3MP CMOS chip, with 5.2 x 5.2 micron pixels for  highly accurate guiding
-Compact housing measures just 2.5" x 2.35" and weighs a mere 4.4 oz.
-Included software offers automatic calibration and guiding with a single mouse click
-Powered via your computer's high-speed USB 2.0 connection; no other power source needed
-ST4 compatible autoguide output jack on camera body