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Diagonals

Star diagonals and erecting prisms for refractors, Cassegrains and Maksutovs — 1.25", 2" and SCT-thread fittings, in dielectric, mirror and prism forms. Goods ship factory-sealed. Not sure which fitting your focuser or visual back takes? Ask us before you order and we'll confirm it.

21 products

Showing 1 - 21 of 21 products

Showing 1 - 21 of 21 products
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Explore Scientific 3-inch 99% dielectric star diagonal with 2-inch adapter3-inch dielectric star diagonal showing compression ring eyepiece holder
Explore Scientific Explore Scientific 3-inch 99% Dielectric Star Diagonal with 2-inch Adapter
$584.00 USD
Baader 2" BBHS Prism Star Diagonal Prism with 2" ClickLock ClampBaader 2" BBHS Prism Star Diagonal Prism with 2" ClickLock Clamp
Baader Planetarium Baader 2" BBHS Prism Star Diagonal Prism with 2" ClickLock Clamp
$519.00 USD
Takahashi TKA00543 2 inch mirror diagonal with 1.25 inch adapterTakahashi TKA00543 2 inch mirror diagonal product photo
Takahashi Takahashi 2" Mirror Diagonal with 1.25" Adapter
$494.00 USD
Baader 2" BBHS Mirror Diagonal with 2" ClickLock ClampBaader 2" BBHS Mirror Diagonal with 2" ClickLock Clamp
Baader Planetarium Baader 2" BBHS Mirror Diagonal with 2" ClickLock Clamp
$449.00 USD
Precision Amici Diagonal
Baader Planetarium Precision Amici Diagonal
$330.00 USD
Clicklock 2" Diagonal
Baader Planetarium Clicklock 2" Diagonal
$288.00 USD
Baader FlipMirror II Star DiagonalBaader FlipMirror II Star Diagonal
Baader Planetarium Baader FlipMirror II Star Diagonal
$221.00 USD
Explore Scientific 2" DiagonalExplore Scientific 2" Diagonal
Explore Scientific Explore Scientific 99% Reflective 2-Inch Dielectric Star Diagonal
$218.00 USD
Takahashi 1.25 inch multicoated prism star diagonal for refractor, Schmidt-Cassegrain and Maksutov visual observingTakahashi 1.25 inch prism star diagonal showing eyepiece-side compression ring
Takahashi Takahashi 1.25" Multicoated Prism Star Diagonal
$116.00 USD
William Optics 1.25 inch 45 Deg. Erecting PrismWilliam Optics 1.25 inch 45 Deg. Erecting Prism
William Optics William Optics 1.25 inch 45 Deg. Erecting Prism
$107.00 USD
2"PRISM - 45 DEGREE, SCT threads
Antares 2"PRISM - 45 DEGREE, SCT threads
$100.00 USD
2" Mirror Diagonal with Twist Lock for SCT
Antares 2" Mirror Diagonal with Twist Lock for SCT
$92.00 USD
2" Mirror Diagonal with 2" Twist Lock
Antares 2" Mirror Diagonal with 2" Twist Lock
$92.00 USD
2" Mirror Diagonal with pressure band for SCT
Antares 2" Mirror Diagonal with pressure band for SCT
$92.00 USD
2" Mirror Diagonal with pressure band
Antares 2" Mirror Diagonal with pressure band
$92.00 USD
1.25" Diagonal with Twist Lock. 99% Reflective
Antares 1.25" Diagonal with Twist Lock. 99% Reflective
$75.00 USD
Takahashi TKA00111 1.25 inch adapter for 2 inch diagonalTakahashi 1.25 inch Adapter for 2 inch Diagonal TKA00111 shown from the eyepiece side with its knurled thumbscrews
Takahashi Takahashi 1.25" Adapter for 2" Diagonal
$54.00 USD
SVBONY SV188P 1.25 inch 90 degree dielectric mirror star diagonal for visual observingSVBONY SV188P 1.25 inch 90 degree dielectric mirror star diagonal for visual observing
SvBony SVBONY SV188P 1.25″ 90° Dielectric Mirror Diagonal
$44.00 USD
Antares 90 degree Correct-Image Star Diagonal (1.25")
Antares Antares 90 degree Correct-Image Star Diagonal (1.25")
$34.00 USD
1.25 Diagonal
Antares 1.25 Diagonal
$30.00 USD
Antares 1.4" 45 degree Elliptical diagonal
Ontario Telescope and Accessories Antares 1.4" 45 degree Elliptical diagonal
$27.00 USD