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Orion Telescopes

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Orion SkyQuest XX16g GoTo Truss Tube Dobsonian Telescope
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  • Our 16" truss-tube GoTo Dob presents a perfect combination of big-aperture optics and sophisticated, fully motorized object location technology for the ultimate in Dobsonian telescope performance and observing convenience
  • A big, 16" aperture telescope designed for maximum portability - both the optical tube and Dobsonian base can be broken down quickly without tools into easily manageable components for convenient transport in any standard size car
  • Features accurate, motorized GoTo pointing and tracking of over 42,000 celestial objects within its GoTo system database, and enough aperture for great views of each one
  • Closed-loop electronics forgive accidental bumps and allow the telescope to be moved manually without losing alignment of the GoTo system. Heavy-duty clutches on both axes allow independent adjustment of motion to desired level of resistance
  • Huge 16" (406mm) diameter, convex-back parabolic primary mirror with enhanced, 94% reflectivity aluminum coating delivers outstanding views of faint deep-sky objects


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Item #  08963

Our largest Dobsonian reflector yet is an ideal combination of three key telescope features: large aperture, convenient portability, and precise GoTo object location. Thanks to its 16" aperture parabolic primary mirror, the Orion SkyQuest XX16g GoTo Truss Tube Dobsonian will astound you with spectacular views of the night sky. Its Orion-designed collapsible Dobsonian base and 8-pole truss optical tube makes transportation of this hefty telescope easy since the entire telescope can be disassembled without tools into small, manageable component pieces that can fit in virtually any standard size car. You'll be able to enjoy the XX16g's large-aperture optics thanks to the accurate, motorized GoTo system which will automatically locate and track any of over 42,000 celestial curiosities within its computerized database of night sky objects.    
 
The powerful, high-tech, and downright BIG SkyQuest XX16g 16" GoTo Truss Tube Dobsonian takes deep-sky observing to new space-penetrating depths. It is the latest and largest in our line of fully automatic GoTo truss tube Dobsonians. For serious amateur astronomers seeking big-aperture exhilaration, state-of-the-art GoTo electronics, and a clever Dobsonian design that is transportable in almost any size vehicle -- the XX16g is an ideal "lifetime" telescope!

Wait, you're thinking, it fits in almost any size vehicle? Yes, you can take this big telescope with you, because both the Dobsonian base and optical tube of the XX16g were engineered by Orion to quickly disassemble - without tools - into easily manageable components, the heaviest of which (base groundplate assembly) weighs 61.4 lbs.

Truss Tube Dob Chart

If all you need is to move the assembled XX16g GoTo Dobsonian from garage to yard and back again, we'll have an optional transport solution available soon which allows the telescope to be rolled while fully assembled. Featuring 10" pneumatic tires, this transport solution is particularly useful for moving the assembled XX16g telescope from a garage out onto the driveway or into your favorite backyard observing spot. It obviates the need to disassemble the telescope just to move it a short distance!

Both the 16"-diameter (406mm), lightweight parabolic primary mirror and 91mm minor-axis secondary mirror of the SkyQuest XX16g are made of low-expansion glass and feature enhanced 94% reflectivity aluminum coatings for optimal observing performance. The XX16g delivers a giant 77% jump in light grasp compared to a 12" Dobsonian reflector, and even a sizeable 30% gain over a 14" aperture telescope! Those elusive celestial objects you once considered "faint fuzzies" won't be nearly so faint or so fuzzy through the SkyQuest XX16g GoTo Truss Tube Dobsonian! You'll enjoy views that simply cannot be seen in smaller telescopes.

The lightweight primary mirror cools more efficiently than standard flat-back parabolic mirrors, thanks to its thin, curved-back design. The primary mirror is held in place by an open-ventilation mirror cell which also helps the mirror to acclimate quickly. This special mirror cell features three large knurled knobs for easy collimation adjustments, and can accommodate an optional 12V Three Fan Cooling System (sold separately) for even faster temperature equilibration.  
 
While the XX16g is easy to disassemble for convenient portability, once it's assembled it is a very solid telescope. The rigid 8-pole truss tube provides great structural rigidity of the optical tube and virtually eliminates flexure that can affect 6- and 3-pole designs. The XX16g GoTo Dobsonian base utilizes thick, 1" composite wood panels for extra-strong support, and features perpendicular struts that brace the side panels when assembled for rock-solid performance. All base boards are laminated with water-resistant melamine.

The XX16g's SynScan GoTo system includes a database of over 42,000 celestial objects. Dual optical encoders and servo motors in each axis pinpoint any object you select with the backlit hand controller and track its motion. The closed-loop electronics let you slew the telescope by hand if desired, while still maintaining the GoTo alignment. Heavy-duty clutch knobs on both axes can be adjusted to the desired level of resistance.

If you were to point the XX16g Dobsonian optical tube straight up, the telescope eyepiece would be positioned 72-3/8" (6.03') above the ground. Of course, during most observing sessions the eyepiece will be considerably lower than this maximum height, but no matter where you point the XX16g at night, you're sure to be astonished by the bright, sharply detailed views this amazing telescope provides.

The SkyQuest XX16g comes equipped with a 2" dual-speed Crayford focuser with 1.25" adapter, and includes a 28mm 2" DeepView eyepiece and a 12.5mm illuminated reticle eyepiece for precise GoTo system alignment. Other accessories include an EZ Finder II reflex sight, eyepiece rack, GoTo hand controller bracket, 12V DC power cable, and RS-232 cable for firmware updates. A 12V field battery or AC-to-DC adapter (sold separately) is required for motorized operation.

An optional Light Shroud for the optical tube is also available and highly recommended (Light Shroud sold separately). Keep your XX16g optical tube safe and clean during transport or storage with the recommended optional Case Set (sold separately).

It's a BIG telescope you can take anywhere! Get the Orion SkyQuest XX16g and enjoy jaw-dropping views of the night sky in a big yet pleasantly portable GoTo Dobsonian telescope.
 

Warranty

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 at 800-676-1343.

Product Support
Visit our product support section for instruction manuals and more
  • Best for viewing
    Fainter deep sky
  • Best for imaging
    Lunar & planetary
  • User level
    Advanced
  • Optical design
    Reflector
  • Optical diameter
    406mm
  • Focal length
    1800mm
  • Focal ratio
    f/4.4
  • Optics type
    Parabolic
  • Glass material
    Low thermal expansion glass
  • Eyepieces
    DeepView 28.0mm (2"),Plossl 12.5mm (1.25")
  • Magnification with included eyepieces
    64x, 144x
  • Resolving power
    0.29arc*sec
  • Lowest useful magnification
    58x
  • Highest theoretical magnification
    800x
  • Limiting stellar magnitude
    15.7
  • Optical quality
    Diffraction limited
  • Finder scope
    EZ Finder II
  • Focuser
    2" dual-speed Crayford
  • Secondary mirror obstruction
    91mm
  • Secondary mirror obstruction by diameter
    22%
  • Secondary mirror obstruction by area
    5%
  • Mirror coatings/over-coatings
    Enhanced Aluminum & Silicon Dioxide
  • Mount type
    Dobsonian
  • Astro-imaging capability
    Simple moon shots
  • Computerized compatibility
    Go-To included
  • Alignment procedure
    2-Star alignment
  • Number of objects in database
    42,000+
  • Bearing material
    AZ: Thrust needle bearings ALT: Ball bearings
  • Power requirement
    12-volt DC (tip positive)
  • Setting circles
    Electronic, via the hand controller
  • Available ports
    RS-232
  • Tube material
    Steel
  • Tripod material
    Wood
  • Weight, optical tube
    89.8 lbs.
  • Weight, mount/tripod
    105.0 lbs.
  • Weight, fully assembled
    195.0 lbs.
  • Additional included accessories
    2" Dual-Speed Crayford focuser w/ 1.25" adapter, 12V DC power cable, Serial cable for firmware updates
  • Other features
    Closed loop servo drive GoTo system, Collapsible base for convenient transportation, Choose from auto tracking or GoTo mode
  • Warranty
    One year

XX16g optical tube bottom section
XX16g optical tube top section
Truss poles
GoTo Base
Carrying handles for base (x2)
SynScan hand controller and cables
Assembly hardware
16" parabolic primary mirror and support cell
DeepView 28mm 2" eyepiece
12.5mm illuminated Plossl eyepiece
Eyepiece rack
EZ Finder II finder scope
Extension tube, 2"
2.2-lb. counterweights (x9)
Collimation cap
Hand controller mounting bracket
Dust covers (x2)
12V DC power cable
RS-232 serial cable
Set of hex keys

Orders received by noon Pacific Time for in-stock item the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

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