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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.

ONLY £74.99

Antares 45 Erecting Prism 2'' Push Fit

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

ONLY £79.00

iOptron 1.25'' Dielectric Mirror Diagonal

William Optics new 45 Deg. EP will work with any 1.25" eyepieces and scopes with 1.25" eyepiece holders. It will turn upside down images right side-up and give correct left-to-right image.

ONLY £84.00

William Optics 45 Erecting Prism 1.25''

This high precision CNC Engineered metalwork, looks as good as it performs. Available as either a 2" push fit for refractor telescopes or a low profile SCT fitting.

ONLY £84.99

Antares 2'' 99% Dielectric Mirror Diagonals

Baader's T-2, 90 degree prism gives extremely bright and very high contrast images to the viewer through very high transmission rates. With the release of this product Baader have maintained their exceptional standards of optical manufacturing.

ONLY £85.00

Baader Prism Diagonal T-2 / 90 Degree 32mm

All New 90 degree high quality Erecting prism With helical Focuser barrel.

ONLY £85.00

William Optics 2019 90 Erecting Prism 1.25'' With Helical Focuser

The Takahashi muli-coated 90 degree diagonal is the perfrect complement to Takahashi eyepieces. This high quality diagonal features the Takahashi compression ring that firmly secures the eyepiece without marring the finish.

ONLY £89.00

Takahashi 90 Multi Coated Prism Diagonal 1.25''

High quality erecting prism with Red anodized plate , the complete housing is made by 6061T Aluminium by CNC. This 1.25" 90 erecting prism will very useful for daytime observations.

ONLY £89.00

William Optics RedCat Erecting Prism 1.25''

1.25 RedCat Erecting Prism in silver for a perfect match to the new SpaceCat 51! Now you can use your SpaceCat during the day with correctly orientated views.

ONLY £89.00

William Optics RedCat Erecting Prism 1.25'' In Silver

Introducing New model William Optics Dura-Bright diagonal - a dramatic step forward in the evolution of mirror diagonals!

ONLY £92.00

William Optics Dura Bright 1.25'' Dielectric Diagonal

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