GSO 16" Truss Dobsonian Telescope

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GSO 16" Truss Dobsonian Telescope

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A giant easy to use telescope that gives stunning high-detail views of the night sky

Dobsonians give the best value for money of any telescope. You get a large aperture at an affordable price. The design is simple and solid. It consists of a solid tube and a wooden box-like mount. Setting up is as simple as putting the mount on the ground, slotting in the tube and attaching the springs. You navigate the night sky by moving the scope left and right, up and down, by hand. This is simple and intuitive for beginners when compared with more complicated mounts. 

The 16" (406mm) mirror collects 78% more light than a 12". Images are bright. Planetary nebulae will be full of details that cannot be seen in smaller scopes. Galaxies will reveal their spiral arms. Planets and the moon can be viewed in stunning detail. In good conditions you will see clearly the smaller spots on Jupiter, the great red spot will start to show its swirl pattern and Saturn will show its stunning weather patterns including lightning storm activity. The limit on what you can see will not be the telescope, it will be the observing conditions. 

GSO mirrors are made from optical quality BK7 glass and are limited only by diffraction, which means they achieve the theoretical maximum resolution possible for the size of the mirror. They are machined and polished to better than 1/12 wavelength, sometimes 1/16 wavelength, which is considerably better than the industry norm.  

The mount has a brake/tension system that makes it easy to keep the scope in balance, for example when changing eyepieces. Roller bearings allow for precise pointing and tracking. 

It comes with several extras, including a Crayford focuser for extra smooth focussing with no spring-back, an 8x50 finder scope and three eyepieces. It is ready to use out of the box. 


What's in the box? 

  • 16" (406mm) f/4.5 Newtonian optical tube assembly

  • 9mm Plossl 1.25" eyepiece

  • 15mm Plossl 1.25" eyepiece

  • 26mm Kellner 2" eyepiece

  • 2" 10:1 Crayford focuser with adaptor for 1.25" eyepieces 

  • 8x50 finder scope

  • Dobsonian base (assembly required)

  • Cooling fan 


Optical design Newtonian
Primary mirror 16" (406mm) BK7 glass with surface quality better than 1/12 wave RMS
Focal length 1800 mm  
Focal ratio f/4.5 
Finder scope  8x50mm fully coated achromatic finder  
Focuser  Crayford 2" focuser 
Eyepieces  9mm and 15mm Plossl 1.25" and 26mm Kellner 2"   
Base Elevation brake tension system. Azimuth roller bearings.
Total height  1.9m tube plus base 
Weight of tube  33kg 
Weight of tube plus base 58kg 


People who want a large, easy to use scope for visual viewing of planets, the Moon and deep sky objects. 
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