Telescope Diagonals

1.25" 45-deg Correct-Image Diagonal for Transporter Refractor By Orion

$Picture of 1.25" 45-deg Correct-Image Diagonal for Transporter Refractor$

This 1.25" 45-degree Orion Correct-Image Telescope Diagonal is custom designed for the Orion Transporter 70mm refractor telescope. It provides a correctly oriented image for terrestrial viewing. It threads on to the back end of the telescope for a secure fit.

$34.95

1.25" Orion Prism Star Diagonal By Orion

For astronomical use, this diagonal produces an image that's right-side-up, and reversed left to right. Fully coated prisms for superior image fidelity. Accepts 1.25" eyepieces.

$34.95

#918A Diagonal Prism 1.25" By Meade

#918A Diagonal Prism 1.25".

$42.00

#928 45 Degree Erect Image Prism 1.25" By Meade

Prism #928 reorients the image of any refractor or Schmidt-Cassegrain telescope for day use. Provides a comfortable viewing position. NOT for Dobsonian or Newtonian reflectors.

$43.00

1.25" Orion Correct-Image Star Diagonal By Orion

For terrestrial or astronomical use, this diagonal produces an right-side-up, nonreversed image. Fully coated prisms for superior image fidelity.

$44.95

#937 2" Diagonal Mirror for DS-2060/2070/2080 Models By Meade

Large-barrel 2" eyepieces permit wide fields of view impossible to achieve with eyepieces of smaller barrel diameter. The focusers of all Meade DS-Series telescopes include 2" eyepiece-holders to accept the oversize #937 Diagonal Mirror, which in turn accepts eyepieces of 2" barrel diameter. An adapter is included to allow for the use of standard 1.25"-barrel eyepieces in the 2" Diagonal Mirror as well.

$49.00

#932 45 Degree Erecting Prism for ETX-90/105/125 Models By Meade

#932 45° erecting prism for ETX-90, ETX-105, ETX-125 models. For terrestrial observing with your ETX Astro Telescope, the #932 Prism results in a fully correctly oriented image and a convenient 45° observing angle.

$49.00

#933 45 Degree Erecting Prism for ETX-60/70/80AT By Meade

#933 1.25" 45° erecting prism for ETX-60/70/80AT telescopes (only). Reorients images for daytime use and provides a comfortable viewing position.

$49.00

1.25" 45-Degree Erecting Prism By TeleVue

45° Erecting Amici Prism – 1.25"

$60.00

1.25" Orion Enhanced Mirror Star Diagonal By Orion

Don't put a standard-issue diagonal into a high-quality refractor or Cassegrain telescope or you'll be losing 10% or more of the light collected by the telescope's optics. Use an Orion Enhanced telescope diagonal instead. Their lab-tested enhanced aluminum coatings reflect 97% of the inbound light to your eyepiece, for brighter images compared to standard diagonals.

$64.95

1.25" Deluxe 45 Degree Erecting Prism By Stellarvue

High quality unit uses compression ring and has a tapered insert tube for better alignment. Provides images that are right side up and correctly oriented. As with all erecting prisms, suggested for daytime use only.

$69.00

90-Degree Diagonal 1.25" By Lumicon

The Lumicon 1.25" 90 degree Correct Image Diagonal provides a corrected image (left/right; up/down) for finder and spotting scopes. May also be used on refractors and SCTs. Includes filter threads.

$69.95

2" Mirror Diagonal By Orion

Many observers prefer to use a good-quality mirror diagonal instead of a prism diagonal with high-end telescope systems. The mirror in this 90° diagonal is meticulously polished to yield maximum performance. The housing is made of black-anodized aluminum. The barrel is internally blackened.

$74.95

1.25" Dielectric Mirror Star Diagonal By Orion

Our highest-quality mirror diagonals feature sophisticated, lab-tested dielectric coatings that boast an astounding 99% reflectivity. Dielectric coatings are more durable than enhanced aluminum coatings, so you'll enjoy years of exceptional performance.

$84.95

Straight-Thru Erecting Prism By Borg

Straight through erecting prism.

$87.00

2" Enhanced Mirror Star Diagonal By Orion

Enhanced aluminum coatings reflect 97% of the inbound light to your eyepiece. The mirror in this 90° diagonal is meticulously polished to yield excellent performance. Anodized aluminum housings are internally blackened. Fits 1.25" focusers, accepts 1.25" eyepieces.

$94.95

1.25" Deluxe Enhanced Dielectric Diagonal By Stellarvue

Dielectric 1 1/4" Mirror Star Diagonal. Comes with a thick, precision, optical flat mirror with an enhanced 99% reflective dielectric coating. Compression ring holds eyepieces firmly and the insert tube has the safety groove and filter thread. All aluminum construction. Individually alignment tested and star tested here for excellent performance.

$99.00

Enhanced Aluminum Star Diagonal 1.25" By Lumicon

The Lumicon Enhanced Aluminum Diagonal reflects 96 to 97 percent of the light from the telescope's primary optics directly into your eyepiece. Its single 1/8 wave precision-polished surface is superior to the three surfaces of prism diagonals. Lumicon collimates each diagonal mirror, ensuring that the light reflected from the diagonal is perfectly perpendicular to the telescope's optical axis.

$99.95

Series 5000 Enhanced Dielectric 2" Diagonal By Meade

Boost eyepiece performance with the new 2" Series 5000 enhanced diagonal. This thermally stable, interferometer-tested, enhanced dielectric-coated diagonal boasts 99% reflectivity. Also includes a 1.25" eyepiece adapter.

$119.00

2" Dielectric Mirror Star Diagonal By Orion

Features sophisticated, lab-tested dielectric coatings that boast an astounding 99% reflectivity. Its dielectric coatings are more durable than enhanced aluminum coatings. Machined and anodized aluminum housing features machine-threaded baffles for high contrast.

$124.95