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.
Filters
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...
View full detailsBaader 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...
View full detailsAntares 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...
View full detailsWilliam 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...
View full detailsCelestron 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...
View full detailsCelestron 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...
View full detailsSvbony 2'' 90 degree Diagonal with 1.25" Adapter (W2733A)
Svbony 2'' 90 degree Diagonal with 1.25" Adapter The Svbony 90 degree Diagonal coating is precision machined to achieve and maintain good optical ...
View full detailsAskar 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...
View full detailsWilliam 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...
View full detailsCelestron 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...
View full detailsAntares 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...
View full detailsSVBONY 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...
View full detailsSVBONY 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...
View full detailsSVBONY 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...
View full detailsTakahashi 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...
View full detailsWilliam 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...
View full detailsiOptron 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...
View full detailsCelestron 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...
View full detailsWilliam 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...
View full detailsWilliam Optics 1.25" inch RedCat Erecting Prism - Silver Version (D-EP90-125-RC51-SL)
William Optics 1.25" inch RedCat Erecting Prism - Silver Version (for RedCat 51 only) High quality erecting prism with Red anodized plate , the com...
View full detailsTele 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...
View full detailsTele 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...
View full detailsTele 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 ...
View full detailsTele 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″ ...
View full detailsTele 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...
View full detailsTele 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...
View full detailsLunt 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...
View full detailsLunt 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...
View full detailsLunt 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 ...
View full detailsLunt 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 ...
View full detailsLunt 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 ...
View full detailsLunt 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...
View full detailsLunt 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...
View full detailsCelestron 2" Mirror Diagonal (93527)
Celestron 2" Mirror Diagonal There are few telescope accessories that work as hard or matter as much as a diagonal! An integral part of the optical...
View full detailsCelestron 2" Dielectric Star Diagonal with Twist-Lock (93573)
Celestron 2" Dielectric Star Diagonal with Twist-Lock Ensure maximum light transmission without loss of optical quality with the Celestron Dielectr...
View full detailsBaader T-2/90° Deluxe Amici Prism with BBHS Coating (AMICI-DX1)
Baader T-2/90° Deluxe Amici Prism with BBHS Coating T-2/90° Baader Roof-Prism. Manufactured by Zeiss standard, both sides with T-2 system threads....
View full detailsin Canada over 500$+* bf txs
Paybright and Sezzle at Check Out
Contact us!
Find a Better Price? We Will Match it!
Sign Up to Astronomy Plus Newsletters
Subscribe to our Newsletter to be the first to be inform about Promotions, New Products and More!