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Star diagonals are important devices that divert the path of the beam of light coming from the telescope so that you do not have to strain to see, but can view comfortably and hence enjoy your observing more. The star diagonal’s prism deflects the light by 90°. Refractors, Schmidt-Cassegrain and Maksutov optics often need this device.

Amici prisms divert the light, usually by 45° or even 90°, providing an upright and non-reversed image for terrestrial observing.

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Omegon Amici-Prisma 90°, 1,25''
Omegon
Amici-Prisma 90°, 1,25''
( 5 / 5 )
$ 29.90
ready for shipping in 24 h
Omegon Carbonline 2", 90° mirror star diagonal, 99% dielectric
Omegon
Carbonline 2", 90° mirror star diagonal, 99% dielectric
$ 199.00
Sale price:
$ 185.98
ready for shipping in 24 h
Omegon Carbonline 2'', 90° SC mirror star diagonal, 99% dielectric
Omegon
Carbonline 2'', 90° SC mirror star diagonal, 99% dielectric
$ 199.00
ready for shipping in 24 h
Omegon 1,25'' Amici Prism 90°
Omegon
1,25'' Amici Prism 90°
( 5 / 5 )
$ 169.00
ready for shipping in 24 h
Omegon 45°, 1.25'' to 1.25'' Amici prism
Omegon
45°, 1.25'' to 1.25'' Amici prism
$ 99.00
ready for shipping in 24 h
Omegon Mirror star diagonal, 90°, 1.25"
Omegon
Mirror star diagonal, 90°, 1.25"
$ 29.90
ready for shipping in 24 h
Omegon Star diagonal with 99% reflection, 2"
Omegon
Star diagonal with 99% reflection, 2"
( 5 / 5 )
$ 219.00
ready for shipping in 24 h
Seben Zenitprisma 90° AP3 1,25''
Seben
Zenitprisma 90° AP3 1,25''
$ 12.90
Sale price:
$ 10.29
ready for shipping in 24 h
Omegon 1.25" 45° erecting prism
Omegon
1.25" 45° erecting prism
$ 44.90
ready for shipping in 24 h
Omegon 2'', 45° Amici prism
Omegon
2'', 45° Amici prism
$ 199.00
ready for shipping in 24 h
Omegon Amici prism 90° 2"
Omegon
Amici prism 90° 2"
$ 269.00
ready for shipping in 24 h
Omegon 45°, 2'' to 1.25'' Amici prism
Omegon
45°, 2'' to 1.25'' Amici prism
$ 219.00
ready for shipping in 24 h
Omegon Pro Penta Prisma 90° 1.25''
Omegon
Pro Penta Prisma 90° 1.25''
$ 239.00
ready for shipping in 24 h
Omegon Pro 1.25'', 45° penta-prism
Omegon
Pro 1.25'', 45° penta-prism
$ 189.00
ready for shipping in 24 h
Baader Diagonal mirror ClickLock 2"
Baader
Diagonal mirror ClickLock 2"
( 5 / 5 )
$ 308.00
ready for shipping in 24 h
Bresser Star diagonal 99 Percent Reflectivity 2"
Bresser
Star diagonal 99 Percent Reflectivity 2"
$ 83.00
ready for shipping in 24 h
Celestron Amici prism 45°, 1.25''
Celestron
Amici prism 45°, 1.25''
$ 51.00
ready for shipping in 24 h
Celestron zenith prism 90°, 1.25"
Celestron
zenith prism 90°, 1.25"
( 5 / 5 )
$ 40.90
ready for shipping in 24 h
Bresser Amici Prisma 45° 1.25''
Bresser
Amici Prisma 45° 1.25''
$ 51.00
ready for shipping in 24 h
Artesky Diagonal mirror 90° 1.25"
Artesky
Diagonal mirror 90° 1.25"
( 5 / 5 )
$ 78.00
ready for shipping in 24 h
Skywatcher Amici prism 45° 2"
Skywatcher
Amici prism 45° 2"
$ 124.00
ready for shipping in 24 h
Auriga Amici prism 45° 1,25"
Auriga
Amici prism 45° 1,25"
$ 83.00
ready for shipping in 24 h
APM Diagonal mirror 90° 99% 2"
APM
Diagonal mirror 90° 99% 2"
$ 130.00
ready for shipping in 24 h
TS Optics 1.25", mirror star diagonal for Imaging Star apochromats
TS Optics
1.25", mirror star diagonal for Imaging Star apochromats
$ 145.00
ready for shipping in 24 h
William Optics Diagonal mirror Dura Bright 90° 2"
William Optics
Diagonal mirror Dura Bright 90° 2"
$ 238.00
ready for shipping in 3-5 weeks
William Optics Dura Bright 1.25" 90° mirror star diagonal
William Optics
Dura Bright 1.25" 90° mirror star diagonal
$ 186.00
ready for shipping in 3-5 weeks
Levenhuk Diagonal mirror Ra 90° 2"
Levenhuk
Diagonal mirror Ra 90° 2"
$ 136.00
ready for shipping in 1-2 weeks
Baader Amici prism ClickLock BBHS® 90° 2"
Baader
Amici prism ClickLock BBHS® 90° 2"
$ 700.00
ready for shipping in 1-2 weeks
Omegon Carbonline 1.25'', 90° mirror star diagonal, 99% dielectric
Omegon
Carbonline 1.25'', 90° mirror star diagonal, 99% dielectric
$ 139.00
Product can be shipped as of 01.02.2025
Meade Diagonal mirror Series 5000 2"
Meade
Diagonal mirror Series 5000 2"
$ 270.00
Product can be shipped as of 01.04.2025
Baader Diagonal prism 2" ClickLock BBHS®
Baader
Diagonal prism 2" ClickLock BBHS®
$ 530.00
ready for shipping in 1-2 weeks
Baader 2" BBHS®-Click-Lock mirror star diagonal
Baader
2" BBHS®-Click-Lock mirror star diagonal
$ 498.00
Product can be shipped as of 15.01.2025
Celestron Diagonal mirror Twist-Lock 2"
Celestron
Diagonal mirror Twist-Lock 2"
$ 342.00
ready for shipping in 1-2 weeks
TS Optics Diagonal mirror 90° 1.25"
TS Optics
Diagonal mirror 90° 1.25"
$ 120.00
Product can be shipped as of 10.01.2025
Baader Amici prism 90° 2"
Baader
Amici prism 90° 2"
$ 304.00
ready for shipping in 1-2 weeks
Baader Zenith prism T-2/90° 32mm prism
Baader
Zenith prism T-2/90° 32mm prism
$ 115.00
ready for shipping in 1-2 weeks