Topical Terminology > Bino-viewer
1 Definition
Bino-viewer
For Bino-viewer we have a term and definition in Telescope.
Bino-viewer (Telescope) 
An optical gadget that splits the single beam of light coming out of a telescope into two parts, so you can observe with both eyes at once. Bino-viewers generally do not work with all telescopes or all eyepieces.
Good bino-viewers are quite expensive.
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