| A star diagonal is a mirror or prism system that lets you view objects that are at an angle (usually 90°) from the direction a refractor or catadioptric (Schmidt-Cassegrain or Maksutov-Cassegrain) telescope is pointing. This allows you to view comfortably when the telescope is pointed at, or near, the zenith (i.e. directly overhead) by looking straight into the scope in order to see overhead. You dont have to twist your neck into an uncomfortable position to see objects over your head with a star diagonal. The image in a star diagonal is right side up, but will be reversed from left to right. A star diagonal cannot be used with a reflector telescope, nor is it needed with such a scope. |
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TeleVue - short adapter to use 2" diagonals on Schmidt-Cassegrains
| Our Product #: 7785SC | | TeleVue #: ACS-0004 |
| Back-Ordered: | Temporarily out of stock; will charge and ship when available. |
| This physically short 1.5 long by 2 diameter adapter tube allows the use of conventional 2 star diagonals (the kind that have a 2 diameter barrel that fits into a refractors 2 focuser drawtube) on a Schmidt-Cassegrain telescope's threaded rear cell. With some smaller aperture telescopes and some 2 diagonals, the diagonal may hit the drive base when the scope tries to swing the . . .
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