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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

Diagonals

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$109.00 - $109.00
$109.00
$109.00 - $109.00
$109.00

David Astro 99% Dielectric Twist-Lock Diagonal - 1.25"

DAV-DIG-TL-1.25
8 in stock

The 1.25" 99% Dielectric Twist-Lock Diagonal is an essential upgrade for astronomers seeking the best in optical performance and convenience. This...

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$109.00 - $109.00
$109.00
$109.00 - $109.00
$109.00
$159.00 - $159.00
$159.00
$159.00 - $159.00
$159.00

David Astro 99% Dielectric Twist-Lock Diagonal - 2"

DAV-DIG-TL-2
Only 5 left!

The 2" 99% Dielectric Twist-Lock Diagonal is an essential upgrade for astronomers seeking the best in optical performance and convenience. This pre...

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$159.00 - $159.00
$159.00
$159.00 - $159.00
$159.00
$149.00 - $149.00
$149.00
$149.00 - $149.00
$149.00

David Astro Penta Prism Diagonal - 1.25"

DAV-PENTA-1.25
Only 4 left!

The David Astro Penta Prism 90-Degree Diagonal is a non inverting non reversing diagonal. It’s particularly suited for use with the David Astro Pre...

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$149.00 - $149.00
$149.00
$149.00 - $149.00
$149.00
$199.99 - $199.99
$199.99
$199.99 - $199.99
$199.99

Explore Scientific 99% Reflective Diagonal -2"

ES-DD02-00CF

The Explore Scientific 2-inch Dielectric-Coated Diagonal Mirror comes complete with 1.25-inch Adapter and dust covers. Solid construction and light...

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$199.99 - $199.99
$199.99
$199.99 - $199.99
$199.99
$589.99 - $589.99
$589.99
$589.99 - $589.99
$589.99

Explore Scientific 99% Reflective Diagonal -3"

ES-DD03-01CF

The Explore Scientific 3-inch Dielectric-Coated Diagonal Mirror comes complete with 2 inch Adapter and dust covers. Solid construction and light we...

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$589.99 - $589.99
$589.99
$589.99 - $589.99
$589.99
Tele Vue 60º Everbrite Diagonal - 1.25" 2
Tele Vue 60º Everbrite Diagonal - 1.25" 1
$369.00 - $369.00
$369.00
$369.00 - $369.00
$369.00

Tele Vue 60º Everbrite Diagonal - 1.25"

TV-DPC-6012

Reflectivity: 99% Everbrite Dielectric Coatings Viewing Angle: 60° Barrel Size: 1.25" Construction: Machined Aluminum Housing Eyepiece Holder: Non...

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$369.00 - $369.00
$369.00
$369.00 - $369.00
$369.00
Tele Vue 90º Enhanced Aluminum Diagonal - 1.25" 1
$216.00 - $216.00
$216.00
$216.00 - $216.00
$216.00

Tele Vue 90º Enhanced Aluminum Diagonal - 1.25"

TV-DSC-0125

Diagonal Type: 90° Mirror (Star) Barrel Size: 1.25" Reflectivity: 96% Eyepiece Holder: Brass Clamp Ring Filter Threads: Yes (1.25") Weight: 5 oz (...

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$216.00 - $216.00
$216.00
$216.00 - $216.00
$216.00
Tele Vue 90º Everbrite Diagonal - 1.25" 1
$325.00 - $325.00
$325.00
$325.00 - $325.00
$325.00

Tele Vue 90º Everbrite Diagonal - 1.25"

TV-DPC-1250

Reflectivity: 99% Dielectric Coating Substrate Material: Pyrex Barrel Size: 1.25" Optical Angle: 90° Eyepiece Holder: Non-marring Brass Clamp Ring...

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$325.00 - $325.00
$325.00
$325.00 - $325.00
$325.00
Tele Vue 90º Everbrite Diagonal 1
$450.00 - $450.00
$450.00
$450.00 - $450.00
$450.00

Tele Vue 90º Everbrite Diagonal - 2"

TV-DDP-8004
1 in stock

Reflectivity: 99% Dielectric Coatings Mirror Substrate: Pyrex Body Construction: CNC-Machined Aluminum Eyepiece Holder: Non-Marring Brass Clamp Ri...

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$450.00 - $450.00
$450.00
$450.00 - $450.00
$450.00
$110.00 - $110.00
$110.00
$110.00 - $110.00
$110.00

William Optics 45° Erecting Prism - 1.25"

WO-D-EP125
6 in stock

45-degree erecting prism for 1.25" telescope eyepieces Provides correct image orientation for terrestrial and astronomical viewing Des...

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$110.00 - $110.00
$110.00
$110.00 - $110.00
$110.00
$116.00 - $116.00
$116.00
$116.00 - $116.00
$116.00

William Optics 90° Erect Prism - 1.25"

WO-D-EP90-125II
6 in stock

90-degree erecting prism for 1.25" telescope eyepieces Provides correct image orientation for terrestrial and astronomical viewing Des...

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$116.00 - $116.00
$116.00
$116.00 - $116.00
$116.00
$138.00 - $138.00
$138.00
$138.00 - $138.00
$138.00

William Optics 99% Dielectric Dura Bright Diagonal - 1.25"

WO-D-125D-C-DB
1 in stock

High-quality 1.25" diagonal for refractor and catadioptric telescopes 99% reflectivity dielectric coating for maximum light transmission ...

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$138.00 - $138.00
$138.00
$138.00 - $138.00
$138.00
$158.00 - $158.00
$158.00
$158.00 - $158.00
$158.00

William Optics 99% Dielectric Dura Bright Diagonal - 2"

WO-D-DIG2D-C-DB-T
4 in stock

High-quality 2" diagonal for refractor and catadioptric telescopes 99% reflectivity dielectric coating for maximum light transmission ...

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$158.00 - $158.00
$158.00
$158.00 - $158.00
$158.00
$159.00 - $159.00
$159.00
$159.00 - $159.00
$159.00

William Optics RedCat WIFD Erecting Prism - 1.25"

WO-D-EP90-125-RC51III
1 in stock

1.25" erecting prism for correct image orientation Silver-finished design specifically for RedCat telescopes Description The W...

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$159.00 - $159.00
$159.00
$159.00 - $159.00
$159.00