2" diagonals

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Accessories / Visual and Everything Else / 2" diagonals
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2" diagonals
A star diagonal is a mirror or prism system that lets you view objects that are at an angle (usually 90°) from the direction a refractor or catadioptric (Schmidt-Cassegrain or Maksutov-Cassegrain) telescope is pointing. This allows you to view comfortably when the telescope is pointed at, or near, the zenith (i.e. directly overhead) by looking straight into the scope in order to see overhead. You don’t have to twist your neck into an uncomfortable position to see objects over your head with a star diagonal. The image in a star diagonal is right side up, but will be reversed from left to right. A star diagonal cannot be used with a reflector telescope, nor is it needed with such a scope.
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2' 99% reflectivity dielectric mirror diagonal for refractors, with compression ring eyepiece holder and 1.25' adapter
 
Astronomy Technologies - 2" 99% reflectivity dielectric mirror diagonal for refractors, with compression ring eyepiece holder and 1.25" adapter 
Our Product #:  AT2D

In Stock: Usually ships within one business day.
This 2” dielectric mirror-type star diagonal would be an outstanding value at twice the price. At this low price, if there ever was a bargain in astronomy, this is it . . .

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$119.95



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2' 99% reflectivity dielectric mirror diagonal for SCTs, with compression ring eyepiece holder and 1.25' adapter
 
Astronomy Technologies - 2" 99% reflectivity dielectric mirror diagonal for SCTs, with compression ring eyepiece holder and 1.25" adapter 
Our Product #:  AT2SD

Back-Ordered: Temporarily out of stock; will charge and ship when available.
This 2” dielectric mirror-type star diagonal is designed to give you first-class performance with a Schmidt-Cassegrain – at a money-saving and far from first-class price . . .

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$149.95



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Astro-Tech one-piece machined 2' diagonal with 1/10th wave quartz mirror, 99% reflectivity dielectric coatings, compression ring eyepiece holder, and 1.25' adapter
 
Astronomy Technologies - Astro-Tech one-piece machined 2" diagonal with 1/10th wave quartz mirror, 99% reflectivity dielectric coatings, compression ring eyepiece holder, and 1.25" adapter 
Our Product #:  AT2DQ1

Back-Ordered: Temporarily out of stock; will charge and ship when available.
A one-piece body, state-of-the-art 46-layer 99% reflectivity dielectric coatings, and a 1/10th wave accuracy quartz mirror are just three of the reasons this Astro-Tech 2” star diagonal is the best buy among premium star diagonals . . .

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$249.95



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2' 99% reflectivity guaranteed 1/10th wave dielectric quartz mirror diagonal for SCTs, with compression ring eyepiece holder and 1.25' adapter
 
Astronomy Technologies - 2" 99% reflectivity guaranteed 1/10th wave dielectric quartz mirror diagonal for SCTs, with compression ring eyepiece holder and 1.25" adapter 
Our Product #:  AT2SDQ

In Stock: Usually ships within one business day.
This 2” Astro-Tech star diagonal for catadioptric telescopes has a quartz mirror with guaranteed 1/10th wave accuracy and state-of-the-art 46-layer dielectric mirror coatings for a full 99% reflectivity and the brightest possible images . . .

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$199.95



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2' Starbright XLT enhanced aluminum mirror diagonal for SCTs, with compression ring eyepiece holder and 1.25' adapter
 
Celestron - 2" Starbright XLT enhanced aluminum mirror diagonal for SCTs, with compression ring eyepiece holder and 1.25" adapter 
Our Product #:  7719
Celestron #: 93527

In Stock: Usually ships within one business day.
This 2” first surface mirror diagonal for Schmidt-Cassegrains has a 1.25" eyepiece adapter and Starbright XLT enhanced multicoatings for better than 96% reflectivity . . .

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$129.95
List Price: $215.95



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2” 99% reflectivity dielectric mirror diagonal, with 1.25” adapter
 
Meade - 2” 99% reflectivity dielectric mirror diagonal, with 1.25” adapter 
Our Product #:  5000D2
Meade #: 07677

Back-Ordered: Temporarily out of stock; will charge and ship when available.
This 90° 2” mirror star diagonal uses premium dielectric coatings for an exceptionally high 99% reflectivity . . .

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$149.00



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adapter to use 2' refractor diagonals and 2' accessories on Schmidt-Cassegrains
 
Meade - adapter to use 2" refractor diagonals and 2" accessories on Schmidt-Cassegrains 
Our Product #:  MSCT2
Meade #: 07085

In Stock: Usually ships within one business day.
This two-part adapter tube lets you use 2” refractor-type star diagonals on a Schmidt-Cassegrain telescope's threaded rear cell . . .

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$39.00



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2' quartz silver mirror for 7' Questars
 
Questar - 2" quartz silver mirror for 7" Questars 
Our Product #:  29110

Back-Ordered: Temporarily out of stock; will charge and ship when available.
This 2” Questar star diagonal allows the use of 2” eyepieces with the 7” Questar Maksutov. Its 1/20th wave first surface quartz mirror has silver mirror coatings for optimum light transmission and contrast . . .

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$495.00



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1/10th wave accuracy 2' compression ring mirror w/1.25' adapter
 
Takahashi - 1/10th wave accuracy 2" compression ring mirror w/1.25" adapter 
Our Product #:  TDM0200
Takahashi #: TDM0200

Back-Ordered: Temporarily out of stock; will charge and ship when available.
This 2” diagonal uses a telescope-grade elliptical mirror with a guaranteed 1/10th wave surface accuracy for superb high contrast/high detail lunar, planetary, and deep space images . . .

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$509.95
List Price: $599.00



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2' mirror diagonal with 96% reflectivity enhanced aluminum coatings and compression ring
 
TeleVue - 2" mirror diagonal with 96% reflectivity enhanced aluminum coatings and compression ring 
Our Product #:  7780C
TeleVue #: DSC-2001/8001

In Stock: Usually ships within one business day.
This 90° 2” mirror-type star diagonal has enhanced aluminum mirror coatings for 96% reflectivity. The mirror is overcoated with quartz for long life. The diagonal is designed for refractors with 2” focuser drawtubes . . .

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$215.00
List Price: $250.00



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