Corrrect Image

These diagonals turn the inverted/upside down image produced by astronomy telescopes upright and in a correct (left/right) orientation.  This will allow you to see the correct/true orientation of the object.  For terestrial applications, it is recommended that you consider the 45 degree diagonal and for astronomy purposes the 90 degree diagonal.

These diagonals add extra length in the light path and you need to ensure that you have sufficient back-focus (focuser far enough out) to allow you to reach focus after you add the diagonal.  As a general rule, Newtonian telescopes does not have enough backfocus while refractors and catadioptric telescopes will have enough back focus.  Some apochromatic telescopes may require a diagonal or other spacer to ensure that you reach focus.  This is because they are primarilly designed for astrophotography where the focal plane is some distance behind the focuser.



Product Image Item Name- Price
Celestron Diagonal 45 degree Erect Image

Celestron Diagonal 45 degree Erect Image

Celestron Diagonal 45o Erect Image. Celestron Diagonal 45o Erect Image diagonal offers out-of-this-world views of land objects.  It features an Amici...
R995.00

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GSO 1.25" 45° Erect Image Prism Diagonal

GSO 1.25" 45° Erect Image Prism Diagonal

GSO 1.25" 45° Erect Image Prism Diagonal GSO's 1.25" 45-degree diagonal features an image erecting Amici prism that allows you to look into...
R675.00

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GSO 1.25" 90° Erect Image Prism Diagonal

GSO 1.25" 90° Erect Image Prism Diagonal

GSO 1.25" 90° Erect image prism diagonal. It allows you to look into the telescope at a 90° angle, at images that are oriented properly, meaning...
R675.00

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Orion 1.25" 45° Correct-Image Prism Diagonal

Orion 1.25" 45° Correct-Image Prism Diagonal

Orion 1.25" Correct-Image prism diagonal. Features : 45° BendProvides a correctly orientated image for terrestrial viewing  For terrestrial or...
R745.00

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