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Diagonals

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Antares 90° Star Diagonal 1.25''

Antares 90° Star Diagonal 1.25"£29.99

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

Second Hand 2'' Push Fit 90° Mirror Diagonal

Second Hand 2" Push Fit 90° Mirror Diagonal£30.00

Second hand 2" mirror diagonal. The mirror is in good condition. There are some marks on the barrel where it has been attached to a scope. Comes with lens caps.

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.

Skywatcher 90° Star Diagonal 1.25''

Skywatcher 90° Star Diagonal 1.25"£35.00

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.

Celestron 90 Degree Star Diagonal 1.25''

Celestron 90 Degree Star Diagonal 1.25"£39.00

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.

Celestron Diagonal Erect Image 45 degree 1.25''

Celestron Diagonal Erect Image 45 degree 1.25"£39.00

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.

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

Meade Erecting Prism  45 Degree #928 1.25''

Meade Erecting Prism 45 Degree #928 1.25"£40.00

This 45-degree viewing angle image erecting diagonal is designed to use 1.25" eyepieces in catadioptric telescopes with a 1.25" visual back or in refractors with a 1.25" focuser drawtubes.

Skywatcher 45° Erecting Prism 1.25''

Skywatcher 45° Erecting Prism 1.25"£41.00

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"£41.00

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.

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.

Antares 2MDS 2'' SCT Diagonal 92% Enhanced Aluminum

Antares 2MDS 2" SCT Diagonal 92% Enhanced Aluminum£54.99

Antares 92% Enhanced 2" SCT Fitting diagonal.

Bresser Messier 2'' Mirror Diagonal

Bresser Messier 2" Mirror Diagonal£65.00

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).

Skywatcher 90° Star Diagonal 2''

Skywatcher 90° Star Diagonal 2"£72.00

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.

Antares 45° Erecting Prism 2'' Push Fit

Antares 45° Erecting Prism 2" Push Fit£74.99

For use on refractors and SCT telescopes to provide a correctly oriented image. An additional adaptor is required to fit SCT telescopes as this adaptor is a 2" push fit.

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Page 1 of 4:    55 Items