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Telescope Diagonals

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Celestron 2" XLT Schmidt-Cassegrain Mirror Diagonal
4.0 / 5.0
Celestron's 2" XLT Diagonal boasts high performance StarBright XLT coatings, allowing you to take full advantage of the wider field of view provided by 2" eyepieces.
$149.95

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Orion 1.25" 45-degree Correct Image Prism Telescope Diagonal
4.8 / 5.0
For upright, non-reversed images you need a correct-image diagonal. The Orion 45anddeg; Correct-Image Prism Diagonal is perfect for terrestrial viewing with a refractor or Cassegrain telescope. Fully multi-coated prisms give you superior image fideli
$49.99

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Tele Vue 2" Everbrite Telescope Diagonal
5.0 / 5.0
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.
$290.00

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Orion 1.25" Prism Star Telescope Diagonal
4.4 / 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.
$37.99

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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.
$39.99

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2" Orion Refractor Telescope Mirror Diagonal
5.0 / 5.0
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" Enhanced Mirror Star Telescope Diagonal
4.8 / 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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Orion 1.25" Deluxe 45-degree Correct-Image Prism Diagonal
4.6 / 5.0
Turn any refractor or Maksutov-Cassegrain telescope into a high-performance spotting scope! The Deluxe 45-degree Correct-Image Prism Diagonal transmits a right-side-up, correct left-to-right view. Not recommended for use with Newtonian reflectors.
$79.99

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Meade Coronado 5mm Solar Blocking Filter Diagonal
Coronado BF-5 right angle (1.25" diagonal) type secondary blocking filter. The blocking filter is the second element in any Coronado H-alpha system, it is just as crucial to your safety and the system's performance as the front element.
$329.00

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Meade Coronado 10mm Solar Blocking Filter Diagonal
Coronado BF-10 right angle (1.25" diagonal) type secondary blocking filter. The blocking filter is the second element in any Coronado H-alpha system, it is just as crucial to your safety and the system's performance as the front element.
$499.00

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Meade Coronado 15mm Solar Blocking Filter Diagonal
Coronado BF-15 right angle (1.25" diagonal) type secondary blocking filter. The blocking filter is the second element in any Coronado H-alpha system, it is just as crucial to your safety and the system's performance as the front element.
$699.00

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Meade 1.25" 90-degree Mirror Diagonal #918A
1.0 / 5.0
Meade #918A Diagonal Mirror (1.25") #07202. Diverts light 90 degrees to the telescope's main tube, permitting a more comfortable viewing position.
$39.99

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Meade 1.25" 45-Degree Image Erecting Prism Diagonal #932
Meade Model 932 Image Erecting Prism #07210 for ETX-90 and ETX-125. Produces a correctly oriented image and convenient 45-deg observing angle for terrestrial observations.
$49.99

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Meade 1.25" 45-Degree Image Erecting Prism for Refractors
Meade Model 928 Image Erecting Prism for Meade refracting telescopes #07217. 1.25"" barrel. Produces a correctly oriented image and convenient 45-deg observing angle for terrestrial observations.
$39.99

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Meade 1.25" 45-Degree Image Erecting Prism, ETX-60, 70 & 80
Meade Model 933 Image Erecting Prism for ETX-60, ETX-70 and ETX-80 Models. Produces a correctly oriented image and convenient 45-deg observing angle for terrestrial observations. A great item for a home with a view or nature watching.
$49.99

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Meade Series 5000 2" Enhanced 90-degree Mirror Diagonal
Meade Series 5000 2"" Enhanced Diagonal Mirror #07680. Our best diagonal for Meade LX90 and LX200 models. Features an incredible 99% reflectivity over the visual spectrum.
$149.99

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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 Dielectric Twist-Tight Mirror Telescope Diagonals
With their twist-tight clamping mechanisms, Orion Dielectric Twist-Tight Mirror Star Diagonals present a significant upgrade from typical thumbscrew-equipped diagonals. Boasting 99% reflectivity, these are the perfect diagonals for peak performance.
$119.99 - $189.99
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