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Diagonals

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Skywatcher 90° Star Diagonal 1.25''

Skywatcher 90° Star Diagonal 1.25"£32.00

A high quality 90 degree star diagonal. For use with Refractor and SCT telescopes. Using this diagonal will ensure a comfortable viewing position when using your telescope.

Antares 45° Erecting Prism 1.25''

Antares 45° Erecting Prism 1.25"£34.99

45° Erecting Prisms include an internal flat mirror to reflect light to the telescope's 90° astronomical observing position; in this position the telescope's image is upright, but reversed.

Antares 90° Star Diagonal 1.25''

Antares 90° Star Diagonal 1.25"£34.99

Upgrades your existing cheap prism or mirror diagonal (ie the ones you commonly get bundled with telescopes) for vastly improved resolution at the eyepiece.

Skywatcher 45° Erecting Prism 1.25''

Skywatcher 45° Erecting Prism 1.25"£39.00

High quality 45° erect image diagonal. Corrects the image on refractors and SCT telescopes. The 45° angle will provide a comfortable viewing position when using your telescope terrestrially.

Skywatcher 90° Erecting Prism 1.25''

Skywatcher 90° Erecting Prism 1.25"£39.00

This 90° diagonal will provide corrected views on Refractor and SCT telescopes. High quality finish such as chrome barrel and high quality thumb screws for securing eyepieces.

Antares 90° Erecting Prism 1.25''

Antares 90° Erecting Prism 1.25"£39.99

This diagonal is for astronomers who prefer the convenience of 90-degree viewing but want to view a fully corrected image, ie the right way up and not mirror-reversed left to right.

RVO 45° Erecting Prism For Maksutov Telescopes

RVO 45° Erecting Prism For Maksutov Telescopes£39.99

The Rother Valley Optics 45° erecting prism is a nice high quality prism with a convenient 45° angle for terrestrial observing with a maksutov telescope

Bresser 90° Amici Prism Diagonal 1.25''

Bresser 90° Amici Prism Diagonal 1.25"£41.00

The ideal accessory for refractor telescopes
Perfect for nature observations
Easy orientation in the night sky

Celestron Diagonal Erect Image 45 degree 1.25''

Celestron Diagonal Erect Image 45 degree 1.25"£49.99   £42.00

Celestron’s 1-1/4" Erect Image Diagonals are an Amici prism design. This design allows you to look into the telescope at a 45° angle.

Second Hand Skywatcher Deluxe Dielectric Mirror Diagonal 1.25''

Second Hand Skywatcher Deluxe Dielectric Mirror Diagonal 1.25"£42.00

Available in either 1.25" or 2" sizes the mirrors inside these diagonals have undergone a special high-reflectivity multi-coating process, allowing them to reflect 99% of the precious gathered starlight, providing exceptional brightness and contrast. (Standard diagonals typically reflect 90-95% of light).

Celestron 90 Degree Star Diagonal 1.25''

Celestron 90 Degree Star Diagonal 1.25"£49.00

A Star Diagonal brings the eyepiece out at 90 degrees from the telescope tube, allowing comfortable viewing when the telescope is pointed at, or near, the zenith (i.e. directly overhead). The resulting image is the right way up, but is reversed from left to right.

Meade Erecting Prism For ETX 70/80 #933

Meade Erecting Prism For ETX 70/80 #933£50.00

This 45-degree viewing angle image erecting diagonal has a knurled ring that threads onto the Cassegrain focus at the rear of Meade ETX60, 70 and 80 refractors only.

Tele Vue 2'' SCT Upgrade Adaptor

Tele Vue 2" SCT Upgrade Adaptor£59.00

SCT Adapters thread onto the standard Celestron C8 back to allow use of standard 2" eyepiece accessories — such as our Everbrite diagonal mirror.

Skywatcher 90° Star Diagonal 2''

Skywatcher 90° Star Diagonal 2"£69.00

High quality 2" star diagonal. Makes observing at high angles much more comfortable when using Refractor and SCT telescopes. Comes complete with the 2" - 1.25" adaptor so you can use both eyepiece sizes with this diagonal.

Bresser Messier 2'' Mirror Diagonal

Bresser Messier 2" Mirror Diagonal£74.00

The Bresser Messier 2" Mirror Diagonal - 93% Transmission is very good diagonal mirror for refracting and Cassegrain telescopes with 2" focusers (and for the Explore Scientific and Bresser Messier telescopes with 2.5"- HEX focusers).

iOptron 1.25'' Dielectric Mirror Diagonal

iOptron 1.25" Dielectric Mirror Diagonal£79.00

Use the iOptron 90° Dielectric Star Diagonal to place your head in a comfortable viewing position when your refractor or catadioptric optical tube assembly (OTA) is aimed at or near the zenith. Built with a dielectric hard-coated BK-7 glass mirror, the diagonal transmits more than 99% of the incoming light

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Page 1 of 4:    60 Items