The Celestron 1.25" Star Diagonal slides into the focuser (1.25") of your refractor or catadioptric telescope and accepts standard 1.25" eyepieces, allowing you to view objects more comfortably. A diagonal that is angled at 90º helps avoid neck strain when looking through through the eyepiece.
Please note that a 90º diagonal will display images that are right side up, but left to right orientation will be reversed.
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Reflects 99% of gathered starlight!
These diagonals are made to yield maximum performance!