Diagonals

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...

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...

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...

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...

William Optics 1.25" inch RedCat Erecting Prism - Silver Version (for RedCat 51 only) High quality erecting prism with Red anodized plate , the com...

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...

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...

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

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″ ...

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...

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...

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...

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...

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 ...

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 ...

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

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

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

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...

Celestron 2" Dielectric Star Diagonal with Twist-Lock Ensure maximum light transmission without loss of optical quality with the Celestron Dielectr...

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

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...

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...

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....

Baader T-2 BBHS Mirror Diagonal T-2 BBHS star diagonal withT-2 threads for compatibility with all Baader's Astro T2 system of parts Provides high ...

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...

Baader 2" 90° Deluxe Amici Prism with BBHS Coating 2" ClickLock-Clamp and 2" nosepiece Correct image orientation Suited for astronomical observati...

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

Baader 2" BBHS Mirror Diagonal with 2" ClickLock The Baader 2" BBHS Mirror Diagonal with 2" ClickLock brings silver into the 21st Century.  Silver ...

APM 2" Prism Diagonal w/ Fast-Lock and Ultra Broadband Coating In contrast to zenith mirrors, the optical path is closed to the rear on this prism....

APM 2" Herschel Wedge Herschel wedges (Solar prisms) are made for the solar observation with refractors. Appr.  95% of the incoming solar light wil...

APM 2" Dielectric Star Diagonal with Fast Lock With 1/10 wavelength p-v, our star diagonal offers excellent surface accuracy, which results in top ...

Antares 2" 90° Dielectric Diagonal The Antares 2" 90° Dielectric Twist-Lock Diagonal has multilayer dielectric coating with 99% reflectivity in gre...

Antares 2" 90° Dielectric Diagonal for SCT 2MDS-D: 2" Mirror Diagonal for Schmidt-Cassegrain thread-on with pressure band retainer and multilayer d...

Antares 2" 90° Dielectric Diagonal Antares 2" 90° Dielectric Diagonal with pressure band retainer and multilayer dielectric coating with 99% reflec...

Antares 1.25" 90° Mirror Diagonal The Antares 1.25" 90° Mirror Diagonal provides convenient right angle viewing with refractors and Cassegrains. Th...