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Telescope Diagonals
Give views a new angle with mirror and prism diagonals
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Telescope Diagonals

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Orion Dielectric Mirror Telescope Diagonals
Orion dielectric mirror diagonals are our highest quality diagonals, and a very good upgrade for that extra bit of performance in a refractor or schmidt cassegrain telescope. Features 99 percent reflectivity and extremely durable coatings.
$89.99 - $139.99

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Orion 1.25" Prism Star Telescope Diagonal
2.0 / 5.0
The 1.25" Orion Prism Star Diagonal produces right-side-up images that are reversed left to right. The fully coated prisms provide superior image fidelity. It is not recommended for use with reflector telescopes or for terrestrial observing.
$39.99

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Orion 1.25" Enhanced Mirror Star Telescope Diagonal
4.9 / 5.0
The mirror in this 1.25" Orion Enhanced Star Diagonal has been meticulously polished and features enhanced aluminum coatings to yield excellent 97% reflectivity. It fits 1.25" focusers and accepts 1.25" eyepieces. Ideal for refractor telescopes.
$69.99

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2" Orion Refractor Telescope Mirror Diagonal
The 2" Orion Refractor Mirror Diagonal has a meticulously polished mirror to yield maximum performance. It fits 2" focusers, accepts 2" telescope eyepieces and includes a 1.25" eyepiece adapter. Not recommended for use in reflector telescopes.
$79.99

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Orion 1.25" Correct-Image Star Telescope Diagonal
5.0 / 5.0
The 1.25" Orion Correct-Image Star Diagonal is perfect for terrestrial use or for amateur astronomers who want a view that matches the orientation of a star chart.
$49.99

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Orion 1.25" Deluxe 45-degree Correct-Image Prism Diagonal
5.0 / 5.0
Turn any refractor or Maksutov-Cassegrain telescope into a high-performance spotting scope! Install our Deluxe 45° Correct-Image Prism Diagonal in a telescope to transmit a view that's right-side-up and correct left-to-right for sharp daytime views.
$79.99

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Orion 1.25" 45-degree Correct Image Prism Telescope Diagonal
5.0 / 5.0
For upright, non-reversed images you need a correct-image diagonal. The Orion 45-deg Correct-Image Prism Diagonal is perfect for terrestrial viewing with a refractor or Cassegrain telescope. Fully multi-coated prisms give you superior image fidelity.
$49.99

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1.25" Tele Vue Everbrite Telescope Diagonal
The 1.25" Tele Vue Everbrite diagonal delivers top-of-the-line image quality. The dielectric, nonmetallic coating is 99% reflective across the full visual spectrum, resulting in the brightest, most natural image available.
$185.00

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Tele Vue 2" Everbrite Telescope Diagonal
The Tele Vue 2" telescope diagonal is machined from a solid block of aluminum for superior rigidity and alignment. Features very durable dielectric, nonmetallic coatings for 99% reflectivity for the brightest, most natural images available.
$285.00

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Celestron 2" XLT Schmidt-Cassegrain Mirror Diagonal
4.0 / 5.0
The Celestron 2" XLT Mirror Diagonal is designed for Schmidt-Cassegrain Telescopes. This diagonal boasts high performance StarBright XLT coatings that allow you to take full advantage of the wider field of view provided by 2" eyepieces.
$129.95

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About Orion Telescopes & Binoculars

Since 1975 Orion Telescopes & Binoculars has been offering telescopes for sale direct to customers, with an unswerving commitment to best quality products, value and unmatched customer care. Our 100% satisfaction guarantee says it all.

Orion offers telescopes for every level: Beginner, Intermediate, Advanced, and Expert. From our entry level beginner telescopes for amateur astronomers to our Dobsonian telescopes to our most advanced Cassegrain telescopes and accessories, you can find the best telescope for you. And you'll enjoy discount prices by buying your telescope online, direct from Orion. Not sure how to choose a telescope? Orion's Telescope Buyer's Guide is a great place to start.

Orion binoculars are known for quality optics at a great price. We offer binoculars for every viewing interest, including astronomical binoculars, compact binoculars, waterproof binoculars, birding binoculars, and sport and hunting binoculars.

Orion's telescope and astrophotography accessories will enhance your telescope enjoyment without breaking the bank. Expand your viewing experience with accessories ranging from moon filters to power-boosting Barlow lenses to advanced computerized telescope mounts. Capture breathtaking photos with our affordable astrophotography cameras. And when you're stargazing, Orion's telescope cases and covers, observing gear, red LED flashlights, astronomy books and star charts will make your observing sessions more convenient, comfortable and meaningful.

At Orion, we are committed to sharing our knowledge and passion for astronomy and astrophotography with the amateur astronomy community. Visit the Orion Community Center for in-depth information on telescopes, binoculars, and astrophotography. You can find astrophotography "how to" tips and share your best astronomy pictures here. Submit astronomy articles, events, and reviews, and even become a featured Orion customer!