Orion SkyQuest XT8 PLUS Dobsonian Reflector Telescope

Orion SkyQuest XT8 PLUS Dobsonian Reflector Telescope
Item # OR-8974
  • Deluxe upgrade of Orion's popular XT8 Classic Dobsonian boasts multiple key feature enhancements and additional included accessories.
  • Eye-catching metallic blue optical tube rides on a redesigned base with adjustable altitude tension knobs.
  • Convenient thumbscrew-adjustable secondary mirror for easy collimation without tools.
  • Features a 2" dual-speed Crayford focuser with 11:1 fine-focus provides precise focus adjustments for sharp views.
  • Upgraded accessories include a 2" 28mm DeepView eyepiece, 1.25" 10mm Sirius Plossl eyepiece, Safety Film Solar Filter, Shorty 2x Barlow, eyepiece rack, EZ Finder II reflex sight, collimation cap, and more.


Orion SkyQuest XT8 PLUS Dobsonian Reflector Telescope

The sleek redesigned base of Orion's SkyQuest XT8 PLUS Dobsonian not only looks great, it also features weight-reducing cutouts which help make the XT8 PLUS more portable than its XT8 Classic counterpart. The base is quite visible, even in the dark of night, thanks to its white trim. Topping the base (literally) is the big, 8"-aperture, f/5.9 reflector telescope optical tube with a unique, eye-catching metallic blue color. The XT8 PLUS features adjustable tension knobs on the altitude axis, which replace the tensioning springs found on the XT8 Classic model. These adjustable knobs make the XT8 PLUS more versatile, since you can now adjust the tension of the altitude axis of motion to allow use of heavier 2" eyepieces, Barlow lenses, multiple finder scopes, and other hefty accessories. With the altitude tension properly adjusted, using heavier accessories will not cause the optical tube to drift downwards during use.

The SkyQuest XT8 PLUS Dobsonian is built around an 8" (203mm) diameter parabolic primary mirror mounted in a sturdy, 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. The Moon and planets of our solar system like Jupiter, Saturn, and Mars shine brightly in the Orion SkyQuest XT8 PLUS, allowing you to inspect them in high-resolution detail. Enhanced-reflectivity mirror coatings boost the XT8 PLUS Dobsonian's mirror up to 94% reflectivity so as much light as possible is transmitted to the eyepiece, resulting in exceptionally bright, clear views. The point-and-view simplicity of the Dobsonian design is not as complicated as a telescope attached to an equatorial (EQ) mount and tripod. With a little practice, your whole family can use the XT8 PLUS Dobsonian telescope to scan the heavens just like experienced astronomers.

The big, 2" dual-speed Crayford focuser installed on the XT8 PLUS is a significant upgrade compared to the single-speed focuser of the XT8 Classic. The focuser features a step-down 1.25" adapter so you can use both powerful 1.25" eyepieces and wide-field 2" oculars. Thanks to its Crayford design, focus adjustments are smooth, accurate, and virtually free of backlash and flexure, even with heavier 2" accessories installed. With an 11:1 fine-focus ratio, you'll be able to make extremely precise adjustments for sharp, crisply detailed views of whatever celestial quarry you turn your XT8 PLUS towards.

Orion equipped the XT8 PLUS with a thorough set of top-notch accessories to enrich your stargazing experiences. This is one telescope you'll be able to use during daytime hours, thanks to the included Safety Film Solar Filter, which lets you safely observe sunspots as they march across the surface of our nearest star. A 2", 28mm DeepView eyepiece will help you obtain expansive 42x views, while the included 1.25" 10mm Sirius Plossl ocular will provide close-up, 120-power observations. For even more powerful views, use the included Shorty 2x Barlow lens to double the power of any 1.25" telescope eyepiece. You can keep one 2" eyepiece and up to three 1.25" eyepieces at-the-ready with the included eyepiece rack. Aim the XT8 PLUS easily and accurately with the included Orion EZ Finder II reflex sight. Also included are a quick collimation cap for mirror alignment, dust caps for the reflector telescope tube and focuser, and special edition of Starry Night astronomy software with a SkyTheater DVD - a $69.90 value!

Like all reflector telescopes, the XT8 PLUS will likely require minor periodic maintenance to make sure its optical mirrors are aligned, or "collimated". To make collimation adjustments nice and easy, we've outfitted the XT8 PLUS Dobsonian telescope's secondary mirror with knurled thumbscrews so you don't have to hassle with tools to align the reflecting optics.

For easy transport and storage, the Orion XT8 PLUS telescope can conveniently be broken-down into two separate pieces. By unthreading the two altitude tension knobs from the Dobsonian base, you can detach the 46.5" long reflector optical tube and transport each piece separately. With an assembled weight of 42 lbs., the XT8 PLUS is a lot of telescope offered at an amazingly affordable price.

Meets or exceeds all California State Environmental Quality & Safety Regulations (CARB 93120 Phase 2 Compliant).

Additional Information

Additional Information

SKU OR-8974
Manufacturer Orion
Telescope Series Orion SkyQuest
Optical Design Newtonian Reflector
Mount Type Dobsonian Cradle
Warranty Limited Warranty
Telescope Aperture 8"
Telescope Focal Length 1200mm
Telescope Focal Ratio f/5.9
Highest Useful Magnification 300x
Limiting Stellar Magnitude 14.2
Optical Coatings Multi-Coated
Tube Color or Finish Orion Teal Pearl
OTA Mount Type Dobsonian Cradle
Length of Optical Tube 46.5 in.
Optical Tube Weight 20.8 lbs.
Mount Weight 21.2 lbs.
Total Telescope Weight 42.0 lbs.
Alignment Procedure Manual Alignment
Tripod Type Included None, Not Required
CD ROMs Included Starry Night SE
Eyepiece(s) Included Sirius Plossl 10.0mm (1.25"), DeepView 28.0mm (2")
Diagonal Included? No - Not Required
Dew Shield Included? No, Not Necessary
Power Adapter Included None - Does Not Require Power
Finder Included Red Dot Finder

Customer Reviews 1 item(s)

Great for the beginner
I've had this--oh, probably about a year now. The scope is basically the same as the classic. The tool-free collimator knobs are fantabulous. I love the white bumper strip at the bottom--finally can pick mine out of a line-up of classics even in the dark. Dual speed focuser is nice. The 28mm Deep View eyepiece is a good addition. Generally, this is a good buy--nice overall, easy to use scope. Why the low rating? I choose to use an 8" because I don't want to lift heavier scopes, yet I have a Telrad, finderscope, laser pointer, and the heavier Explore Scientific eyepieces attached, and the altitude tension knobs are not up to the task. I just found 106 Messier objects in a marathon where I spent a good portion of the night holding my scope up with my knee. If I tighten it enough to keep it in place, I cannot move the scope. I've tried weights--I keep having to add and subtract according to how low on the horizon I am viewing. Truly frustrating. Soooooo....if you are not planning to put multiples or heavy equipment on the end of this scope, it is a keeper and I'd surely give it a 5. Otherwise...I'd suggest you keep looking.
1= Houston, We Have a Problem & 5= It's Out of This World
Review by GalaxiesnNebulae / (Posted on 4/7/2014)
Included Items

Included Items

  • Orion SkyQuest XT8 PLUS Dobsonian Reflector Telescope Optical Tube Assembly with Crayford focuser
  • Dobsonian base
  • Altitude tension knobs
  • Eyepiece rack
  • Orion 2" 28mm DeepView telescope eyepiece
  • Orion 1.25" 10mm Sirius Plossl telescope eyepiece
  • Orion 1.25" Shorty 2x Barlow
  • Orion Safety Film Solar Filter for 8" Reflector Telescopes
  • Orion EZ Finder II Reflex Sight
  • Collimation cap
  • Dust cover for optical tube
  • Starry Night SE software and SkyTheater DVD
Questions & Answers

Product Questions

What are the shipping weight and dimensions of both boxes?
Hi, was wondering if a telrad finder scope could be mounted on my xt8 Plus without using tape or are there mounting screws to attach to the scope? Thank you!
Would like to see a diagram of how you put the table together for a telescope
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