Ritchey-Chretiens

Up until now, the coma-free performance of a true Ritchey-Chrétien optical system came only in large apertures that typically started at well over $10,000 – putting true R-C optics out of the reach of most astrophotographers.

But Astro-Tech asked, “Why should a simple optical tube with only two mirrors and no moving parts have to be big and cost five figures?” Sure, Ritchey-Chrétiens use complex hyperbolic mirrors that are more difficult to make than the simple spherical and parabolic mirrors of Newtonians, Schmidt-Cassegrains, and Maksutovs. And large R-Cs need carbon fiber tubes, quartz mirrors, and cooling fans to prevent even the smallest focal length change during long exposure imaging.

But Astro-Tech also knew that modern computerized mirror grinding technology was now capable of making complex hyperbolic mirrors to the high surface accuracy needed. Buying in large quantities would bring the cost of quartz mirror blanks and carbon fiber optical tubes down to a reasonable price. Reducing the amount of non-essential cosmetic machining and simplifying the mechanical complexity of the system would reduce unnecessary production costs. And machining the scopes at an experienced top-quality off-shore optical shop under precision CNC computer control would keep the quality and consistency up and manufacturing costs down.

So Astro-Tech partnered with the best-known optical shop in Taiwan to produce a full line of top-quality true Ritchey-Chrétien astrographs at prices that most astrophotographers can afford. It really is possible to produce a true Ritchey-Chrétien that you don’t have to be a millionaire to own. Astro-Tech has proved it with the imaging scopes below.

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11 Results (Viewing 1 - 11 of 11)
8
SKU: AT8RC

8" f/8 Ritchey-Chrétien astrograph, carbon fiber tube
Manufacturer: Astro-Tech
$1,395.00 
In stock
10
SKU: AT10RC

10" f/8 Ritchey-Chrétien optical tube
Manufacturer: Astro-Tech
$2,495.00 
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10
SKU: AT10RCF

10" f/8 Ritchey-Chrétien carbon fiber optical tube
Manufacturer: Astro-Tech
$3,495.00 
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12
SKU: AT12RC

12" f/8 Ritchey-Chrétien optical tube
Manufacturer: Astro-Tech
$3,995.00 
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Astro-Tech 6
SKU: AT6RC

6" f/9 Ritchey-Chrétien astrograph
Manufacturer: Astro-Tech
$399.00 
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8
SKU: AT8RCS

8" f/8 Ritchey-Chrétien astrograph, steel tube
Manufacturer: Astro-Tech
$895.00 
In stock

16
SKU: AT16RCT

16" f/8 truss tube Ritchey-Chrétien optical tube
Manufacturer: Astro-Tech
$6,995.00 
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12
SKU: AT12RCT

12" f/8 truss tube Ritchey-Chrétien optical tube
Manufacturer: Astro-Tech
$4,495.00 
20
SKU: AT20RCT

20" f/8 truss tube Ritchey-Chrétien optical tube
Manufacturer: Astro-Tech
$12,995.00 
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10
SKU: AT10RCT

10" f/8 truss tube Ritchey-Chrétien optical tube
Manufacturer: Astro-Tech
$3,495.00 
In stock
Astro-Tech 14
SKU: AT14RCT

Astro-Tech 14" f/8 Carbon Fiber Truss Ritchey–Chrétien
Manufacturer: Astro-Tech
$5,795.00 
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11 Results (Viewing 1 - 11 of 11)


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