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July 1st: Store will be closed for Canada Day. Orders placed that day will ship on July 2nd.
July 1st: Store will be closed for Canada Day. Orders placed that day will ship on July 2nd.

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

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