A powerful telescope capable of providing night after night of stargazing enjoyment, the Orion SkyQuest XT8 Classic Dobsonian is one of our most popular models due to its elegant combination of precision optics, mechanical simplicity, and rock-solid stability. You and your whole family will appreciate the bright, clear views of the night sky provided by the XT8 Classic Dobsonian reflector. The Moon and planets of our solar system like Jupiter, Saturn, and Mars shine brightly in the SkyQuest XT8 Classic, allowing you to inspect them in detail. The XT8’s 8″ aperture is also large enough to gather a significant amount of light from more distant celestial objects for great views of sparkling star clusters, cloudy nebulas, and faraway galaxies. The XT8 Classic Dobsonian is a tremendous value considering the high quality views it provides on such a wide variety of celestial objects. The point-and-view simplicity of the Dobsonian design is not as complicated as a telescope attached to an equatorial (EQ) mount and tripod, so with a little practice, your whole family can scan the heavens just like experienced hobbyists. For any amateur astronomer seeking serious adventure, the XT8 Classic Dobsonian telescope has it all!
The SkyQuest XT8 Classic Dobsonian is built around an 8″ (203mm) diameter parabolic primary mirror mounted in a cast-aluminum support cell. The mirror collects 78% more light than a 6″ mirror, so you get a significant increase in ability to observe dust lanes in nebulas, resolve the cores of prominent globular star clusters, and to reveal some of the more subtle structures in faint galaxies. The 1200mm focal length (f/5.9) XT8 mirror allows you to obtain clear and crisp views at moderate to high magnifications on clear nights with good seeing conditions. Enhanced-reflectivity mirror coatings boost the XT8 Classic Dobsonian’s mirror to 94% reflectivity so as much light as possible is transmitted to the eyepiece, for clear and bright views. The Dobsonian base of the XT8 Classic provides a simple and stable low-profile altazimuth platform for the 8″ aperture reflector optical tube.
The Orion CorrecTension springs make setup easy and keep the telescope balanced.
The tube attaches securely to the base by virtue of Orion’s CorrecTension Friction Optimization system, which utilizes heavy-duty springs to both securely couple the tube to the base, and to keep the telescope in constant balance to avoid drifting during observations. Even with large 2″ eyepieces and accessories installed, the XT8 Dobsonian telescope optical tube will remain balanced throughout your viewing sessions.
Dial-in celestial details with the smooth and accurate 2″ Crayford focuser.
The SkyQuest XT8 Classic Dobsonian features a 2″ Crayford focuser with a removable 1.25″ adapter so it can accept both 1.25″ and 2″ eyepieces and accessories. The Crayford mechanism ensures all focus adjustments are smooth, accurate, and virtually free of backlash and flexure, even with heavier 2″ accessories installed, so you can achieve precise focus easily.
Explore the night sky with the included 25mm Sirius Plossl Eyepiece.
The included 1.25″ Orion 25mm Sirius Plossl eyepiece provides a 48-power view when used with the SkyQuest XT8 Classic Dobsonian telescope. Offering a wide 52° apparent field of view, the 25mm Sirius Plossl eyepiece yields extremely sharp images of impressively high contrast. You can expand your magnification options by purchasing additional 1.25″ or larger 2″ wide-angle eyepieces of different focal lengths. (Additional eyepieces sold separately.)
The included Orion EZ Finder II red-dot sight makes aiming the telescope nice and easy.
Following a simple alignment procedure, you can use the EZ Finder II sight to accurately aim the SkyQuest XT8 Classic Dobsonian telescope at objects in the sky like the Moon and bright planets. Once aligned with the telescope, just turn on the EZ Finder II and peer through the sight’s small circular viewing window so you see the red dot, and move the telescope until the red dot is on the object you want to see. Look in the telescope eyepiece, and the object will be there!
Learn about the night sky with the included Starry Night Special Edition software.
Explore starry skies anytime – even when it’s cloudy! The Orion SkyQuest XT8 Classic Dobsonian telescope includes a FREE digital download insert for a Special Edition of Starry Night astronomy software. With realistic sky simulations and a many useful features including telescope control, the user-friendly Starry Night Special Edition software will help you plan your observations and understand what you see. Requires PC running Windows 7, 8 or 10. Requires Macintosh running OS X 10.4 or higher.
The popular Orion SkyQuest XT8 Classic Dobsonian also includes a quick collimation cap for easy mirror alignment, and dust caps for the reflector telescope tube and focuser.
The Orion XT8 Classic Dobsonian telescope can conveniently be separated into two pieces for easy transport and storage. By unhooking the two CorrecTension springs from the Dobsonian base you can detach the 46.5″ long optical tube. The XT8 reflector optical tube weighs 20.3 lbs., while the 19″ diameter Dobsonian base tips the scales at 20.7 lbs. With an assembled weight of 41 lbs., the XT8 Classic Dobsonian can be easily moved to and from your favorite observing site, whether it’s just a few steps out the back door, or many miles down the road.
A great telescope with the optical strength to please serious beginners and veteran skygazers alike, the Orion SkyQuest XT8 Classic Dobsonian reflector will provide years of astronomical adventure for you and your whole family.
Meets or exceeds all California State Environmental Quality & Safety Regulations (CARB 93120 Phase 2 Compliant).
Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us
Best for viewingBrighter deep sky
Best for imagingLunar & planetary
Glass materialLow thermal expansion borosilicate glass
EyepiecesSirius Plossl 25.0mm (1.25″)
Magnification with included eyepieces48x
Lowest useful magnification29x
Highest useful magnification300x
Highest theoretical magnification406x
Limiting stellar magnitude14.2
Optical qualityDiffraction limited
Finder scopeEZ Finder II
Secondary mirror obstruction47mm
Secondary mirror obstruction by diameter23%
Secondary mirror obstruction by area5%
Mirror coatings/over-coatingsAluminum & Silicon Dioxide
Astro-imaging capabilityLunar & planetary
Computerized compatibilityNot compatible
Bearing materialPTFE and UHMW bearings
Length of optical tube46.5 in.
Weight, optical tube20.3 lbs.
Weight, mount/tripod20.7 lbs.
Weight, fully assembled41.0 lbs.
Other featuresCorrecTension system, 2″ Focuser, 1.25″ eyepiece adapter
In the Box:
Orion SkyQuest XT8 Classic Dobsonian Reflector Telescope Optical Tube Assembly
25mm Orion Sirius Plossl telescope eyepiece (1.25″)
EZ Finder II reflex sight
2″ Crayford-style focuser
2″-to-1.25″ telescope eyepiece adapter
Screws with round knob attached
Top base plate
Ground base plate
Base assembly screws
Feet attachment wood screws
Self-adhesive rubber bumper
Large hex-head bolt
3/8″ lock nut
Socket-head cap screws
Starry Night SE astronomy software digital download insert