Orion's SkyQuest XT8i Intelliscope Dobsonian Computerized Telescope combines powerful 203mm-diameter reflector optics with point-and-view simplicity in a nicely portable package. With the included IntelliScope Computerized Object Locator, the amateur stargazer can pinpoint the location of 14,000+ celestial wonders stored in the IntelliScope's databank. It's like having your own personal tour guide to the universe! The optical tube houses an 8" (203mm) parabolic mirror and rides on our state-of-the-art Dobsonian base, equipped with springless CorrecTension friction control for smooth movement and always-perfect tube balance. One-year limited warranty.