Bob Bunge's TJ2 - Story of a 20-inch Dobsonian Telescope, the history of a 20+ year old Dobsonian
Imaging Planets with the 20-inch Aperture Telescope – Aperture Telescopes
Obsession Telescopes / Telescopes / 20" Classic
20"f/3 and 25"f/3 Dobsonian Telescopes: Summary Description
DesignApplause | Max 20″ acf. Meade telescope.
Obsession Telescopes / Telescopes / 20" Classic
UL20
Best 20" Dobsonian Telescope — New Moon Telescopes
I make telescopes. Here's my 20"/0.5-meter, largest I've built to date. : r/space
Obsession Telescopes / Telescopes / 20" Classic
Moore Observatory Remote/Robotic Telescope
What can I expect from a 20" Dobsonian? - Major & Minor Planetary Imaging - Cloudy Nights
A homemade 20 inch dob lightweight telescope, DS-5
A "Classic" Big Dobsonian - The 20" Obsession Telescope - Go Big or Go Home! - YouTube
20 inch diameter refracting telescope from Warner and Swasey, nicknamed Rachel, originally installed at Chabot Observatory in 1914 and now used at the Chabot Space and Science Center, a science museum and
What can I expect from a 20" Dobsonian? - Major & Minor Planetary Imaging - Cloudy Nights
Review: Meade MAX 20" telescope | WIRED
Meade 20" MAX2-ACF Telescope 2008-MAX-12 B&H Photo Video
UL20
Looking at life through a 20-inch telescope in Danbury
20-inch PlaneWave Telescopes | Sommers-Bausch Observatory | University of Colorado Boulder
What can I expect from a 20" Dobsonian? - Major & Minor Planetary Imaging - Cloudy Nights
Biruni Observatory 20-inch telescope - Stock Image - C015/0252 - Science Photo Library
Obsession Telescopes / Telescopes / 20" Classic
Clyde Bone and His Two Unusual Mersenne Telescopes! – Tele Vue Optics, Inc. Blog
