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GSO 12″ Dobsonian (White)

72,033.90 (Excluding Taxes)

  • GSO 12 Inch Dobsonian: The GSO Dobsonian line is particular model serves a very clear purpose, to offer a large aperture and an excellent image quality at reasonable cost.
  • Set-up is as easy as you can imagine very simple assembly with the rocker box and put it on the ground, insert the telescope tube and put the springs in position and you’re ready to go to navigates through the night sky by simply moving the tube up or down, or side to side, by hand.
  • All GSO dobsonian use optical quality BK7 glass, cooling fans built into the rear cell to decrease cooling times, also all dobs use a roller bearing on the azimuth surface providing dozens of support points for smooth swivel motion. The deluxe model comes with 2″ Micro 10:1 Crayford style focuser and 1.25″ adapter.


GSO 12 Inch Dobsonian Specifications

Optical Tube

  • Tube material: Steel
  • Color: white
  • Aperture: 300 mm
  • Focal ratio: f/5
  • Secondary diameter: 75 mm
  • Obstruction: 25 %
  • Focal length: 1500 mm
  • Mirror material: BK7
  • Coating: 94 % enhanced coting
  • Resolution: 0.38″
  • Limit value: 15.4 mag
  • Max. useful visual power: 600 x
  • Focuser: 2″ Crayford
  • Connection to eyepiece: 2″ , 1 1/4″ with adapter
  • Viewfinder: 8 x 50 with holder
  • Tube diameter: 365 mm
  • Tube weight: 43 lb
  • Included accessories: Azimuth roller bearing
  • Eyepieces: 30 mm 2″ Erfle, 9 mm 1 1/4″ Super Plössl
  • Eyepiece adapter: 1 1/4″
  • Type of mount: Dobsonian mount
  • Height / Diameter of Rockerbox: 64 cm / 63.5 cm
  • Weight of Rockerbox: 29.7 lb

In the Box

  • GSO 12 Inch Dobsonian Telescope
  • Fan behind the main mirror
  • 8×50 Finder with achromatic optic
  • 2″ Crayford focuser – 1:10 micro – reduction from 2″ to 1.25″
  • 30mm 2″ Wide Angle ERFLE with 70° field for good overview
  • 9mm Super Plössl – multicoated
  • 2″ 35mm extension tube
  • Eyepiece and accessory tray for eyepieces and filters

Solar Warning:

  • Never look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result. Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it. Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.

    Support Documents

    Instruction Manual GSO 8″-10″-12″ Dobsonian

    Supporting Videos

  • This video is made using GSO 8″ Dobsonian. This is for reference. Results would be better than this.

Recommended Accessories

  • 1.25″ 2X Achromatic Barlow – To get more magnification while observing your favorite planet
  • Universal Smartphone Adapter – To capture pictures of Moon and planets right in your smartphone immediately as you observe it.
  • T-Ring (Canon) – To capture photos with your Canon EOS DSLR using Telescope tube as high focal length lens for camera.
  • T-Ring (Nikon) – To capture photos with your NIKON DSLR using Telescope tube as high focal length lens for camera.
  • T-Ring (Sony) – To capture photos with your Sony DSLR using Telescope tube as high focal length lens for camera.
  • 1.25″ T-Mount/Adapter – To attached any DSLR directly in the eyepiece barrel when using in combination with DSLR TRing.
  • Customized Telescope Padded bag: Designed to keep your Telescope safe from sudden damages to optics and body, safe of dust and dirt, easy carrying solution.