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Diagonals

This is our selection of diagonals. From dielectric mirrors to regular ones. The diagonal is the accessory you need when you own a refractor or a cassegrain telescope. 

 

Original price $58.05 - Original price $58.05
Original price
$58.05
$58.05 - $58.05
Current price $58.05

SVBONY SV188P Dielectric Diagonal for Refractor 1.25" (F9171B)

SVBONY SV188P Dielectric Diagonal for Refractor 1.25" There are many 1.25" star diagonals on the market. Many of them have a mediocre mirror qualit...

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Original price $58.05 - Original price $58.05
Original price
$58.05
$58.05 - $58.05
Current price $58.05
Original price $202.00 - Original price $202.00
Original price
$202.00
$202.00 - $202.00
Current price $202.00

SVBONY SV223 Diagonal 90-degree 2 inch Clicklock (W9180B)

SVBONY SV223 Diagonal 90-degree 2 inch Clicklock SVBONY SV223 2inch 90-degree diagonal comes with a thick, precision, optical flat mirror with an ...

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Original price $202.00 - Original price $202.00
Original price
$202.00
$202.00 - $202.00
Current price $202.00
Original price $419.00 - Original price $419.00
Original price
$419.00
$419.00 - $419.00
Current price $419.00

Baader 2" Mirror Diagonal with 2" ClickLock (CLDIAG-2)

Baader 2" Mirror Diagonal with 2" ClickLock With their ground-breaking introduction several years ago of the all-dielectric 2" Maxbright star diago...

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Original price $419.00 - Original price $419.00
Original price
$419.00
$419.00 - $419.00
Current price $419.00
Original price $232.00 - Original price $232.00
Original price
$232.00
$232.00 - $232.00
Current price $232.00

William Optics 2" Durabright Diagonal for SCT (D-DIG2D-C-DB-SCT)

William Optics 2" Durabright Diagonal for SCT This 90° 2"mirror-type star diagonal has a Dura-Bright 12mm thick mirror and dielectric mirror coatin...

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Original price $232.00 - Original price $232.00
Original price
$232.00
$232.00 - $232.00
Current price $232.00
Original price $213.00 - Original price $213.00
Original price
$213.00
$213.00 - $213.00
Current price $213.00

William Optics 2" Durabright Diagonal (D-DIG2D-C-DB)

William Optics 2" Durabright Diagonal This 90° 2"mirror-type star diagonal has a Dura-Bright 12mm thick mirror and dielectric mirror coatings for 9...

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Original price $213.00 - Original price $213.00
Original price
$213.00
$213.00 - $213.00
Current price $213.00
Original price $53.20 - Original price $53.20
Original price
$53.20
$53.20 - $53.20
Current price $53.20

Antares 1.25" 45° Erecting Prism Diagonal (EID45)

Antares 1.25" 45° Erecting Prism Diagonal EID45 is a 1.25" 45 degree erecting amici prism for terrestrial viewing and is not recommended for high m...

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Original price $53.20 - Original price $53.20
Original price
$53.20
$53.20 - $53.20
Current price $53.20
Original price $72.00 - Original price $72.00
Original price
$72.00
$72.00 - $72.00
Current price $72.00

Svbony 2'' Dielectric 90 degree Diagonal with 1.25" Adapter (W2733A)

Svbony 2'' Dielectric 90 degree Diagonal with 1.25" Adapter The Svbony Dielectric 90 degree Diagonal coating is precision machined to achieve and ...

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Original price $72.00 - Original price $72.00
Original price
$72.00
$72.00 - $72.00
Current price $72.00
Original price $70.00 - Original price $70.00
Original price
$70.00
$70.00 - $70.00
Current price $70.00

Celestron 1.25" Star Diagonal (94115-A)

Celestron 1.25" Star Diagonal The Celestron 1.25” Star Diagonal slides into the focuser (1.25”) of your refractor or catadioptric telescope and acc...

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Original price $70.00 - Original price $70.00
Original price
$70.00
$70.00 - $70.00
Current price $70.00
Original price $69.00 - Original price $69.00
Original price
$69.00
$69.00 - $69.00
Current price $69.00

Celestron 1.25" 45° Erect Image Diagonal (94112-A)

Celestron 1.25" 45° Erect Image Diagonal Did you know that most telescopes work well for daytime viewing as well as for astronomy? If you have a re...

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Original price $69.00 - Original price $69.00
Original price
$69.00
$69.00 - $69.00
Current price $69.00
Original price $53.20 - Original price $53.20
Original price
$53.20
$53.20 - $53.20
Current price $53.20

Antares 1.25" 90° Erecting Prism Diagonal (EID90)

Antares 1.25" 90° Erecting Prism Diagonal EID90 is a 1.25" 90 degree erecting amici prism for terrestrial viewing and is not recommended for high m...

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Original price $53.20 - Original price $53.20
Original price
$53.20
$53.20 - $53.20
Current price $53.20
Original price $215.00 - Original price $215.00
Original price
$215.00
$215.00 - $215.00
Current price $215.00

Askar 2" Diagonal (DIAG2)

Askar 2" Diagonal The high-quality CNC machined diagonal, with its matte interior coating and gloss oxidized surface, brings a more premium texture...

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Original price $215.00 - Original price $215.00
Original price
$215.00
$215.00 - $215.00
Current price $215.00
Original price $206.00 - Original price $206.00
Original price
$206.00
$206.00 - $206.00
Current price $206.00

Celestron 1.25” Dielectric Star Diagonal with Twist-Lock (93571)

Celestron 1.25” Dielectric Star Diagonal with Twist-Lock Ensure maximum light transmission without loss of optical quality with the Celestron Diele...

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Original price $206.00 - Original price $206.00
Original price
$206.00
$206.00 - $206.00
Current price $206.00
Original price $369.00 - Original price $369.00
Original price
$369.00
$369.00 - $369.00
Current price $369.00

Baader FlipMirror II Star Diagonal (BFM-II)

Baader FlipMirror II Star Diagonal Baader-FlipMirror II Star Diagonal (BFM II) with three ports: Straight-through (S52, M48 and T-2 on both sides...

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Original price $369.00 - Original price $369.00
Original price
$369.00
$369.00 - $369.00
Current price $369.00
Original price $38.00 - Original price $38.00
Original price
$38.00
$38.00 - $38.00
Current price $38.00

SVBONY 1.25" Right Angle Mirror Diagonal (F9171A)

SVBONY SV188 1.25" Right Angle Mirror Diagonal The SV188 mirror diagonal is suitable for refractors, Celestron EQ, Meade Infinity, and similar tel...

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Original price $38.00 - Original price $38.00
Original price
$38.00
$38.00 - $38.00
Current price $38.00
Original price $74.00 - Original price $74.00
Original price
$74.00
$74.00 - $74.00
Current price $74.00

SVBONY Diagonal 45 Degree 1.25-inch Fully Multi-Coated (W9179A)

SVBONY Diagonal 45 Degree 1.25-inch Fully Multi-Coated High-quality 45-degree erecting prism with Phase Coatings allows for good contrast and bri...

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Original price $74.00 - Original price $74.00
Original price
$74.00
$74.00 - $74.00
Current price $74.00
Original price $121.00 - Original price $121.00
Original price
$121.00
$121.00 - $121.00
Current price $121.00

SVBONY 90 Degree Prism Diagonal 1.25" (W9179B)

SVBONY 90 Degree Prism Diagonal 1.25" High-quality 90-degree erecting prism with anti-reflection coating allows for good contrast and bright imag...

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Original price $121.00 - Original price $121.00
Original price
$121.00
$121.00 - $121.00
Current price $121.00
Original price $157.00 - Original price $157.00
Original price
$157.00
$157.00 - $157.00
Current price $157.00

SVBONY Diagonal 1.25 inch 90-degree Clicklock (W9180A)

SVBONY Diagonal 1.25 inch 90-degree Clicklock The diagonal comes with a thick, precision, optical flat mirror with an enhanced 99% reflective diel...

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Original price $157.00 - Original price $157.00
Original price
$157.00
$157.00 - $157.00
Current price $157.00
Original price $878.00 - Original price $878.00
Original price
$878.00
$878.00 - $878.00
Current price $878.00

Takahashi 2" Diagonal Mirror with 1.25" adapter (TKA00543)

Takahashi 2" Diagonal Mirror with 1.25" adapter The Takahashi 2in diagonal is the perfrect complement to Takahashi eyepieces.  This high quality di...

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Original price $878.00 - Original price $878.00
Original price
$878.00
$878.00 - $878.00
Current price $878.00
Original price $149.00 - Original price $149.00
Original price
$149.00
$149.00 - $149.00
Current price $149.00

William Optics 1.25" DURA BRIGHT Dielectric Diagonal (D-125D-C-DB)

William Optics 1.25" DURA BRIGHT Dielectric Diagonal Introducing New model William Optics Dura-Bright diagonal - a dramatic step forward in the evo...

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Original price $149.00 - Original price $149.00
Original price
$149.00
$149.00 - $149.00
Current price $149.00
Original price $107.00 - Original price $107.00
Original price
$107.00
$107.00 - $107.00
Current price $107.00

iOptron Dielectric Star Diagonal (1.25") (6231)

iOptron Dielectric Star Diagonal (1.25")  Use the iOptron 90° Dielectric Star Diagonal to place your head in a comfortable viewing position when yo...

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Original price $107.00 - Original price $107.00
Original price
$107.00
$107.00 - $107.00
Current price $107.00
Original price $60.00 - Original price $60.00
Original price
$60.00
$60.00 - $60.00
Current price $60.00

Celestron 1.25" Visual Back (93653-A)

Celestron 1.25" Visual Back A Visual Back is a metal adapter that screws onto the standard rear cell threads of Schmidt-Cassegrain and Maksutov-Cas...

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Original price $60.00 - Original price $60.00
Original price
$60.00
$60.00 - $60.00
Current price $60.00
Original price $130.00 - Original price $130.00
Original price
$130.00
$130.00 - $130.00
Current price $130.00

William Optics 90° 1.25" Erect Prism (D-EP90-125II)

William Optics 90° 1.25" Erect Prism This 1.25" 90 deg. erecting prism will very happy to be used with that nice premium refractor of yours! Perf...

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Original price $130.00 - Original price $130.00
Original price
$130.00
$130.00 - $130.00
Current price $130.00
Original price $185.00 - Original price $185.00
Original price
$185.00
$185.00 - $185.00
Current price $185.00

William Optics 1.25" inch RedCat Erecting Prism

William Optics 1.25" inch RedCat Erecting Prism High quality erecting prism with Red anodized plate, the complete housing is made by 6061T Alumin...

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Original price $185.00 - Original price $185.00
Original price
$185.00
$185.00 - $185.00
Current price $185.00
Original price $544.00 - Original price $544.00
Original price
$544.00
$544.00 - $544.00
Current price $544.00

Tele Vue 2" 90° Everbrite Diagonal SCT Package (SCP-8202)

Tele Vue 2" 90° Everbrite Diagonal SCT Package Whiter and brighter images. Simply put, that is the benefit the Everbrite mirror coating. The Tele V...

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Original price $544.00 - Original price $544.00
Original price
$544.00
$544.00 - $544.00
Current price $544.00
Original price $524.00 - Original price $524.00
Original price
$524.00
$524.00 - $524.00
Current price $524.00

Tele Vue 2" 90° Everbrite Diagonal (DDP-8004)

Tele Vue 2" 90° Everbrite Diagonal Whiter and brighter images. Simply put, that is the benefit the Everbrite mirror coating. The Tele Vue 2″ 90° Ev...

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Original price $524.00 - Original price $524.00
Original price
$524.00
$524.00 - $524.00
Current price $524.00
Original price $405.00 - Original price $405.00
Original price
$405.00
$405.00 - $405.00
Current price $405.00

Tele Vue 2" 90° Enhanced Aluminum Diagonal (DEP-8003)

Tele Vue 2" 90° Enhanced Aluminum Diagonal The Tele Vue 2″ 90° Enhanced Aluminum Diagonal coating provides a 96% reflective surface across all but ...

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Original price $405.00 - Original price $405.00
Original price
$405.00
$405.00 - $405.00
Current price $405.00
Original price $379.00 - Original price $379.00
Original price
$379.00
$379.00 - $379.00
Current price $379.00

Tele Vue 1.25" 90° Everbrite Diagonal (DPC-1250)

Tele Vue 1.25" 90° Everbrite Diagonal Whiter and brighter images. Simply put, that is the benefit the Everbrite mirror coating. The Tele Vue 1.25″ ...

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Original price $379.00 - Original price $379.00
Original price
$379.00
$379.00 - $379.00
Current price $379.00
Original price $251.00 - Original price $251.00
Original price
$251.00
$251.00 - $251.00
Current price $251.00

Tele Vue 1.25" 90° Enhanced Aluminum Diagonal (DSC-0125)

Tele Vue 1.25" 90° Enhanced Aluminum Diagonal The Tele Vue 1.25" 90° Enhanced Aluminum Diagonal coating provides a 96% reflective surface across al...

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Original price $251.00 - Original price $251.00
Original price
$251.00
$251.00 - $251.00
Current price $251.00
Original price $428.26 - Original price $428.26
Original price
$428.26
$428.26 - $428.26
Current price $428.26

Tele Vue 1.25" 60° Everbrite Diagonal (DPC-6012)

Tele Vue 1.25" 60° Everbrite Diagonal The Tele Vue 1.25″ 60° Everbrite Diagonal is an entirely new angle for Tele Vue! It’s a real breakthrough for...

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Original price $428.26 - Original price $428.26
Original price
$428.26
$428.26 - $428.26
Current price $428.26
Original price $2,916.00 - Original price $2,916.00
Original price
$2,916.00
$2,916.00 - $2,916.00
Current price $2,916.00

Lunt B3400 Blocking Filter (B3400s2)

Lunt B3400 Blocking Filter BLOCKING FILTER ARE REQUIRED ON ALL LUNT SOLAR TELESCOPES The Lunt B3400 Blocking Filter is best for visual work on tele...

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Original price $2,916.00 - Original price $2,916.00
Original price
$2,916.00
$2,916.00 - $2,916.00
Current price $2,916.00
Original price $1,604.00 - Original price $1,604.00
Original price
$1,604.00
$1,604.00 - $1,604.00
Current price $1,604.00

Lunt B600 Calcium K Module

Lunt B600 Calcium K Module Calcium K (Ca-K) telescopes and filters are used to study the wavelength of 393.4 nm. This emission line is one of two t...

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Original price $1,604.00 - Original price $1,604.00
Original price
$1,604.00
$1,604.00 - $1,604.00
Current price $1,604.00
Original price $2,406.00 - Original price $2,406.00
Original price
$2,406.00
$2,406.00 - $2,406.00
Current price $2,406.00

Lunt B1800 Calcium K Module

Lunt B1800 Calcium K Module Calcium K (Ca-K) telescopes and filters are used to study the wavelength of 393.4 nm. This emission line is one of two ...

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Original price $2,406.00 - Original price $2,406.00
Original price
$2,406.00
$2,406.00 - $2,406.00
Current price $2,406.00
Original price $2,020.00 - Original price $2,020.00
Original price
$2,020.00
$2,020.00 - $2,020.00
Current price $2,020.00

Lunt B1200 Calcium K Module

Lunt B1200 Calcium K Module Calcium K (Ca-K) telescopes and filters are used to study the wavelength of 393.4 nm. This emission line is one of two ...

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Original price $2,020.00 - Original price $2,020.00
Original price
$2,020.00
$2,020.00 - $2,020.00
Current price $2,020.00
Original price $576.00 - Original price $576.00
Original price
$576.00
$576.00 - $576.00
Current price $576.00

Lunt B600 Blocking Filter

Lunt B600 Blocking Filter Which Blocking Filter to Choose The smallest recommended BF for a specific scope allows for the most inexpensive version ...

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Original price $576.00 - Original price $576.00
Original price
$576.00
$576.00 - $576.00
Current price $576.00
Original price $1,604.00 - Original price $1,604.00
Original price
$1,604.00
$1,604.00 - $1,604.00
Current price $1,604.00

Lunt B1800 Blocking Filter

Lunt B1800 Blocking Filter Which Blocking Filter to Choose The smallest recommended BF for a specific scope allows for the most inexpensive version...

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Original price $1,604.00 - Original price $1,604.00
Original price
$1,604.00
$1,604.00 - $1,604.00
Current price $1,604.00
Original price $1,044.00 - Original price $1,044.00
Original price
$1,044.00
$1,044.00 - $1,044.00
Current price $1,044.00

Lunt B1200 Blocking Filter

Lunt B1200 Blocking Filter BLOCKING FILTERS ARE REQUIRED ON ALL LUNT SOLAR SYSTEMS The Lunt B1200 Blocking Filter is recommended for imaging use on...

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Original price $1,044.00 - Original price $1,044.00
Original price
$1,044.00
$1,044.00 - $1,044.00
Current price $1,044.00
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