Orion SkyQuest XT12g Go-To Dobsonian Telescope

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Orion SkyQuest XT12g Go-To Dobsonian Telescope
Item # OR-10136
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  • This Orion SkyQuest XT12g Go-To Dobsonian Telescope locates and tracks any of 42,000 celestial objects with the push of a few buttons!
  • 12" aperture reflector optics gulp up light from the night sky for beautiful views of galaxies, nebulas, and star clusters as well as the planets and Moon.
  • All GoTo system motors and hardware come pre-installed on the Dobsonian base for swift and easy assembly.
  • The Orion SkyQuest XT12g Go-To Dobsonian Telescope requires 12V power supply for motorized operation.
  • Package includes 2" dual-speed (11:1) Crayford focuser, 28mm 2" DeepView eyepiece, 12.5mm 1.25" illuminated crosshair Plossl eyepiece, EZ Finder II reflex sight, eyepiece rack, collimation cap, Starry Night software and more!


Orion SkyQuest XT12g Go-To Dobsonian Telescope

Orion Dobsonian telescopes have always been known for superb optical and mechanical quality, wonderful ease of use, remarkably affordable prices. However, as with almost all other Dobsonians on the market, you had to push the telescope to your observing target by hand.

Until now. Orion is pleased to herald another giant leap in Dobsonian evolution with the introduction of the SkyQuest XTg series of fully motor driven GoTo Dobsonian telescopes, including the 12" aperture SkyQuest XT12g. Now, pointing a Dob to even the most elusive of NGC curiosities is as easy as pushing a button or two on the XT12g Dobsonian's illuminated hand controller. High-torque servo motors guided by two pairs of high-resolution encoders then slew the telescope right to your object of interest - any of over 42,000 objects in the GoTo controller's database. No more nudging the reflector telescope tube continuously to keep the object from drifting out of the field of view, either. The Orion XT12g automatically tracks the object's motion, keeping it centered in the eyepiece while you savor the view. Now that's sure to please a crowd of interested friends and family who want to take a peek in the eyepiece at the beautiful view. What's more, the closed-loop electronics of the XT12g let you move the telescope manually - or endure the accidental bump - without losing orientation for accurate, automated GoTo pointing!

The SkyQuest XT12g Dobsonian reflector combines GoTo pointing convenience with excellent portability and an amazingly affordable price (just compare its price to any other 12" GoTo telescope on the market). It features a 305mm (12") aperture, 1500mm focal-length parabolic mirror (f/4.9) made from low-thermal-expansion optical glass, with enhanced reflectivity (94%) aluminum coatings for high-definition images with maximum brightness. The primary mirror is center marked to make alignment of the optics (collimation) easier and more precise. The reflector optical tube comes equipped with a dual-speed 2" Crayford focuser (with 1.25" adapter) so views through either big 2", or powerful 1.25" telescope eyepieces will be sharp and easy to focus. The 11:1 fine focus knob ensures that you'll quickly find that ultra-sharp focus point that makes your target object pop with dazzling clarity!

The GoTo base comes with all optical encoders, drive motors, and gears pre-installed, making assembly a breeze. The optical tube drops into the base on a dovetail trunnion and locks in place with a single hand knob. A simple two-star alignment is all it takes to orient the telescope to the sky for GoTo operation. Then let the fun begin! When you're ready to call it a night, just loosen the knob and lift the tube off the base for easy transport or storage. Handles on the Dobsonian base's front and side panels make it easy to lift and carry, whether you're going from car to field, or from house to backyard.

A great complement of standard accessories with the Orion SkyQuest XT12g GoTo Dobsonian Telescope include an EZ Finder II reflex sight, removable eyepiece rack with holes for one 2" and three 1.25" telescope eyepieces, hand controller mounting bracket, quick collimation cap, a wide-field 28mm DeepView 2" telescope eyepiece, and a 12.5mm illuminated-crosshair Plossl telescope eyepiece (1.25") which enables ultra-precise GoTo system alignment. The XT12g Dobsonian requires power from a 12-volt DC field battery or AC adapter, sold separately. A DC cable is included that has a car auto-lighter style plug on one end for connecting to your 12-volt DC power source, and a coaxial plug on the other end that fits the power jack installed on the base.

You're going to love plying the night skies with the SkyQuest XT12g GoTo Dobsonian telescope. The GoTo hand controller's softly red-illuminated keypad lets you select an object from a variety of intuitive menus, or take a tour of the "best" objects in the sky at any time. The time you'll save by not having to manually search for your targets will allow you to kick back, relax, and spend more time enjoying the magnificent views through the eyepiece. The whole family can enjoy an efficient evening full of astronomical adventures with an Orion SkyQuest XT12g Dobsonian.

If you are an intermediate or advanced deep-sky hunter who wants a big-aperture telescope but not the high price tag, a Dobsonian is the way to go. And now, finally, you can have one that offers the convenience of motor driven accurate GoTo pointing - to anything in the heavens you'd like to see! Make your next telescope the Orion SkyQuest XT12g GoTo Dobsonian reflector!

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

Orion SkyQuest XT12g Go-To Dobsonian Telescope Specifications...

  • Best for viewing: Fainter deep sky
  • Best for imaging: Lunar & planetary
  • User level: Advanced
  • Optical design: Reflector
  • Optical diameter: 305mm
  • Focal length: 1500mm
  • Focal ratio: f/4.9
  • Optics type: Parabolic
  • Glass material: Low thermal expansion glass
  • Eyepieces: 28mm DeepView, 12.5mm Illuminated Plossl
  • Magnification with included eyepieces: 54x, 120x
  • Resolving power: 0.38 arc*sec
  • Lowest useful magnification: 43x
  • Highest useful magnification: 300x
  • Highest theoretical magnification: 610x
  • Limiting stellar magnitude: 15.1
  • Optical quality: Diffraction limited
  • Finder scope: EZ Finder II
  • Focuser: 2" dual-speed Crayford
  • Secondary mirror obstruction: 70mm
  • Mirror coatings/ over-coatings: Aluminum & Silicon Dioxide
  • Mount type: Dobsonian
  • Astro-imaging capability: Simple moon shots
  • Motor drive compatibility: Clock drive included
  • Computerized compatibility: Go-To included
  • Alignment procedure: 2-Star Alignment, Brightest Star
  • Number of objects in database: 42,000+
  • Tracking rates: Sidereal, Solar and Lunar
  • Motor type: DC servo motors with encoders
  • Bearing material: AZ: Thrust needle bearings ALT: Ball bearings
  • Power requirement: 12-volt DC - 2A (tip positive)
  • Available ports: RS-232, Aux
  • Tube material: Steel
  • Tripod material: Wood
  • Optical tube length: 58.3"
  • Optical tube weight: 49 lb.
  • Mount/ tripod weight: 53 lb.
  • Weight, fully assembled: 101.8 lb.
  • Additional included accessories: Eyepiece rack, Navigation knob, 1.25" Eyepiece adapter

Orion Product Number: 10136
Additional Information

Additional Information

SKU OR-10136
Manufacturer Orion
Telescope Series Orion SkyQuest
Optical Design Newtonian Reflector
Mount Type Dobsonian Cradle with GoTo
Warranty 1 Year Warranty
Telescope Aperture 12"
Telescope Focal Length 1500mm
Telescope Focal Ratio f/4.9
Highest Useful Magnification 300x
Limiting Stellar Magnitude 15.1
Optical Coatings Aluminum
OTA Mount Type Dobsonian Cradle
Optical Tube Outer Diameter 305mm
Length of Optical Tube 58.3"
Optical Tube Weight 49 lb.
Mount Weight 53 lb.
Total Telescope Weight 101.8 lb.
Objects in Database 42,000+
Alignment Procedure 2-Star Alignment, Brightest Star
Tripod Type Included None, Not Required
CD ROMs Included Starry Night SE
Eyepiece(s) Included 28mm DeepView, 12.5mm Illuminated Plossl
Hand Controller Included? Yes
Diagonal Included? No - Not Required
Power Adapter Included None - Requires 12V DC Adapter
Finder Included Red Dot Finder
Included Items

Included Items

  • Orion 12" f/4.9 Reflector Telescope Optical Tube Assembly
  • Starry Night Software
  • Dust Cover
  • 28mm DeepView Eyepiece - 2"
  • 12.5mm Illuminated Plössl Eyepiece - 1.25"
  • EZ Finder with Bracket
  • Collimation Cap
  • Eyepiece Rack
  • 2 Eyepiece Rack Wood Screws (20mm long, Black)
  • 2 Hex Keys (2mm, 3mm)
  • Tube to Base Securing Knob
  • Hand Controller Holster with 2 Assembly Screws
  • Left panel with Altitude Motor Pre-installed
  • Right Panel
  • Front Brace
  • Ground Baseplate Assembly with Azimuth Motor Pre-installed
  • 6 Base Assembly Wood Screws (Coarse Thread, 47mm long)
  • 8 Base Assembly Machine Screws (Fine Thread, 60mm long)
  • 3 Handles
  • 6 Handle Mounting Screws (Hex Head, 25mm long)
  • 2 Hex Keys (size 4mm, 6mm)
  • 3 Plastic Feet
  • 3 Feet Wood Screws (1-inch long)
  • Hand Controller
  • Hand Controller Cable
  • AZ Motor Connection Cable
  • RS-232 Computer Cable
  • Primary Mirror
  • Mirror Cell
  • 3 Collimation Knobs
  • 3 Nylon Washers (3/4" Outer Diameter)
  • 3 Springs
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