Explore Scientific FirstLight 200mm (8") Dobsonian Telescope

Explore Scientific FirstLight 200mm (8") Dobsonian Telescope

Due to high demand and global product shortages due to the pandemic, please call for availability.

No telescope type has changed the hobby quite as much as the Dobsonian. Before the introduction of the Dobsonian by John Dobson, the vast majority of amateur telescopes consisted of small telescopes with primitive mechanics - barely enough to see the polar caps of Mars or the rings of Saturn. Larger telescopes, such as the Schmidt-Cassegrain were reserved for the wealthy. The ingenious combination of simple yet effective mechanisms with the greatest possible aperture gives the Dobsonian telescope a unique triumphant march around the world. Nowhere do you get as much light for your money as you do with a good Dobson.

Now, Explore Scientific has come up with the ultimate universal design. This Dobsonian can be converted into a Newtonian telescope. If you ever wanted to take pictures, simply unscrew the bearings from the tube and place the scope on an EQ mount with the included Vixen style dovetail plate.

The unrivaled stiffness of the included 2.5" HEX focuser makes focusing easy and allows the use of both 1.25" and 2" eyepieces. The inclusion of the 2.5" Hex focuser is a quantum leap for this price class of telescope.

A Red Dot viewfinder as well as a 25mm SPL eyepiece are included. Two mounting bases are provided for the finder, one on each side of the focuser.

The Rocker box can be dismantled with a few tools, because the parts are assembled with metal quick connectors. Thus, a bulky rocker box quickly becomes a handy flat package of boards.

A Dobson of this size is a near ideal workhorse for the deep sky observer who travels to dark skies. Details on planets and deep sky objects will be visible even for inexperienced observers. Bright star clusters are resolved to the core, and the sight of the terminator on the moon is an unforgettable experience.

The scope is ready for use with our optional coma corrector.


  • Excellent value
  • 8” aperture provides serious light-gathering and resolving power.
  • Scope and mount can be transported in pieces and reassembled within minutes.
  • Rocker box is easy to assemble with a single screwdriver
  • Includes an accessory tray for eyepieces.
  • 2.5” HEX focuser has helical gearing.
  • Universal design for both visual observation and imaging:
    • 1.5" extension tube for visual observation, removable for imaging
    • Vixen style 44mm dovetail included for mounting to an equatorial mount.
  • Comes with a 25mm SuperPlössl eyepiece, delivering a moderate magnification and bright, crisp image
  • Red dot viewfinder for locating observing targets.
  • Included adapter helps observers use their smart device to capture and share images.


  • Optical type: 8" Newtonian
  • Primary Mirror Diameter: 203mm
  • Secondary Obstruction: 30% by diameter
  • Secondary Mirror Minor Axis: 60mm (2.4")
  • Focal Length: 1218mm
  • Focal Ratio: f/6
  • Focuser: 2.5" Hex with helical gear
  • Includes 1.5" focuser extension
  • Includes 2"-1.25" adapter
  • Finderscope: Red dot type
  • Eyepiece: 1.25" SPL 25mm (49X)
  • Includes smartphone adapter for capturing images through the eyepiece
  • Camera Capable:
    • USB imagers
    • All-in-one cameras via universal digital camera adapter
    • DSLR/SLR (Requires T2 ring, 2" prime focus adapter)
    • Above cameras and adapters sold separately
  • Mount type: Dobsonian
  • Includes 44mm dovetail for equatorial mounts
  • Telescope Optical Tube Length: 114 cm (45")
  • Primary Tube Weight: 11.3 kg (25 lbs)
  • Rocker Box Weight: 9.5 kg (21 lbs)
  • Total Weight: 20.8 kg (46 lbs)
  • Color: White, with black accents
  • Explore Scientific one year limited warranty