The Orion Dobs are excellent telescopes, but they do not have tracking capability. I could be mistaken, but Dobs in general are hand operated. I know this sounds cheap, but there are great advantages to this. Once you have learned your way around the night sky, Dobs are easy to point and easy to look through. They require no power source. They are quiet and fast pointing. Right now, if I tried to look at M13 overhead with a refractor or cassegrain scope, I would need to lay on the ground to look throuhg the eye piece. Not with the Dob. I can see more in less time with no humming motors and battery packs. Additionally, newtonian reflectors give excellent images. The Orion Optics are fantastic. <br /><br /> I own an XT10 with the Inteliscope Computer. After you learn your way around the night sky, GoTo Computers are nice decorations for the side of your telescope. My best investments for the XT10 was not the computer, but the 9x50 Right Angle correct image finder scope - AND - the Orion EZ Finder II. I mounted the EZ Finder below and two the left of the finder scope. This aids in quick pointing and bing in good position to look through the finder scope. The EZ Finder gives me a 10 degree field of view with no magnification that puts me near the center of the Finder Scope view (9x50). The finder scope is an excellent telescope on its own. I can normally see bright clusters and bright nebula with the finder and move the scope precisely over the target or portion of the target I want to view. Once on target, use the lowest power EP to start with and the rest is just playing around. <br /><br />Dobs are for observation only, not photography. They have no tracking.<br /><br />Best of luck<br />Bill<br /><br />