Teeter’s Telescopes’ 8-inch Solid Tube Series Dobsonian has a focal ratio of f/5.7. Black velvet lines the inside of the aluminum tube assembly. Its built-in cooling fan is mounted with vibration ...
Like many observers, I have a fondness for Dobsonian-mounted telescopes. Such instruments allow users to use a large aperture — 8 inches and above — that is inexpensive and easy to transport, set up, ...
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