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OPT 8" f/9 Planet Pro Dobsonian Telescope

Item # OS-8DOB

Availability: Scheduled Delivery



Quick Overview

  • Do you love the low-tech simplicity of a Dobsonian but want the higher contrast images of a longer focal length system?
  • The OPT 8" Pro Planet Dobsonian Telescope has a focal ratio of f/9 and comes with a small 1.25" secondary for APO-like contrast.
  • A four pole truss system makes the OPT Pro Planet Dob easy to transport, even for smaller cars!
  • The OPT 8" Pro Planet Dobsonian Telescope has a nicely finished Birch mount with real Ebony Star and Teflon bearings offer stability and smooth motion in both altitude and azimuth.
  • Comes with 2" 2-speed Crayford focuser, 1.25" adapter, 30mm SuperView eyepiece, Telrad, dust caps, truss carry bag and light shroud.

OPT 8" f/9 Planetary Dobsonian Telescope

The 8" f/9 Pro Planet Truss-Tube Dobsonian was custom-designed and created for OPT by Discovery Telescopes. We wanted something that was easy to transport but that produced those beautiful, high-contrast views that everyone loves so much.

We started with the most important part of any telescope...the optics. Our diffraction-limited 8" f/9 primary mirror is made in the USA of Pyrex, and is multi-coated for bright, sharp images of the planets, the Moon, and deep-sky objects. The mirror is center-marked.

The secondary mirror is small, with a mere 15.6% obstruction, to increase the contrast, and the spider is curved to eliminate diffraction spikes on bright stars and planets. The tube assembly is made up of two thermally stable Sonotube sections (upper and lower), and they are held in place with four truss poles. A truss tube carry bag is included with your OPT Planet Pro Dobsonian, and so is a light shroud and dust caps.

The Dobsonian base is made of Baltic Birch, and comes with real Ebony Star and Teflon bearings for smooth motions across the sky. The telescope comes with adjustable side bearings to allow the balancing of heavy eyepieces.

The focuser is a 2", two-speed Crayford-style model with compression ring fittings, and comes with a 1.25" adapter. Other accessories include a Telrad finder, 2" 30mm SuperView eyepiece, and as mentioned earlier, dust caps, light shroud, and truss carry bag.

OPT 8" f/9 Planetary Dobsonian Telescope Specifications...

  • Tube Diameter is 9.5"
  • Tube Length in Travel Mode - 40.25"
  • Tube Length in Observing Mode - 76"
  • Tube assembly weight is 31 pounds
  • Mount Weight - 21 Pounds
  • Dimensions - 28.25 x 22 x 16 inches
OPT Product Number: OS-8DOB
Manufacturer OPT
Telescope Series Discovery PDHQ
Optical Design Newtonian Reflector - Open Truss
Mount Type Dobsonian Cradle
Warranty 1 Year Warranty
Telescope Aperture 8"
Telescope Focal Length 1828mm
Telescope Focal Ratio f/9
Optical Coatings Aluminum
Limiting Stellar Magnitude 14
Tube Color or Finish OPT Deep Ocean
Finder Included Telrad
Eyepiece(s) Included 30mm SuperView
Optical Tube Weight 31 lbs.
Total Telescope Weight 52 lbs.
Length of Optical Tube 76"
  • OPT 8" f/9 Planetary Dobsonian Telescope
  • 2" 2-speed Crayford Focuser
  • 1.25" Adapter
  • 30mm SuperView Eyepiece
  • Telrad
  • Dust Caps
  • Truss Carry Bag
  • Light Shroud

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