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TELESCOPE DIAGONALS

A telescope diagonal uses mirrors or prisms to redirect the beam of light upward — usually by 45 or 90 degrees — for more convenient viewing with refractor or Cassegrain telescopes.

Orion Telescopes carries top-quality prism and mirror diagonals in both 1.25" and 2" sizes, including some with enhanced, ultra-high reflectivity optical coatings.

While many diagonals produce a backwards view, our correct-image diagonals provide a correctly oriented image, which is practical for terrestrial viewing.



Search All Telescope Diagonals
Price Range:
From: $25 To: $2000
 
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Celestron 2" XLT SCT Mirror Diagonal
Celestron 2" XLT SCT Mirror Diagonal
High Performance XLT Coatings Make This Diagonal a Bright Idea
$119.95
Orion Mirror Star Diagonals for Telescopes
Orion Mirror Star Diagonals for Telescopes
Ideal For Use With High-End Telescopes
From $72.95
Orion Enhanced Mirror Telescope Diagonals
Orion Enhanced Mirror Telescope Diagonals
Enhanced Aluminum Coatings Reflect 97% of the Inbound Light to Your Eyepiece
Customer Rating: 
From $64.95
Orion Dielectric Mirror Telescope Diagonals
Orion Dielectric Mirror Telescope Diagonals
These Diagonals Boast An Astounding 99% Reflectivity!
Customer Rating: 
From $84.95
Tele Vue Everbrite Telescope Diagonals
Tele Vue Everbrite Telescope Diagonals
Dielectric Coating Boasts 99% Reflectivity, for Brighter Images
From $190.00
1.25" 45-deg Orion Correct-Image Prism Diagonal
1.25" 45-deg Orion Correct-Image Prism Diagonal
Recommended for Terrestrial Observing
$44.95
1.25" Orion Correct-Image Star Diagonal
1.25" Orion Correct-Image Star Diagonal
We've Got the Angle on Diagonals
$44.95
1.25" Orion Prism Star Diagonal
1.25" Orion Prism Star Diagonal
We've Got the Angle on Diagonals
Customer Rating: 
$34.95
1.25" 45-deg Orion Correct-Image Diagonal
1.25" 45-deg Orion Correct-Image Diagonal
Converts Your Transporter Refractor into a Terrestrial Spotting Scope
$34.95
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