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design of 254mm, and an astrograph of 305mm. As of the end of 2021, the company's line of telescopes (optical tubes only, consisting of objective lens, tube, and focuser) included only a 92mm refractor and a 130mm refractor, priced in the $ 4000–$ 7000 range. Their more active line of products is three series of computer-controlled "German"-style equatorial mounts priced in the $ 10,000–$ 20,000 range. (Complete telescopes consisting of both optical tube and mount are not currently offered.) Both the telescopes and the mounts, despite being sought-after, are manufactured in small numbers on an irregular basis. None are maintained in stock, and all typically have long lead times. When available on the used market, Astro-Physics' telescopes and mounts command high prices, telescopes often selling for multiples of their original cost. The company also offers a wide array of telescope, mount and imaging accessories available from stock.
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Astro-Physics has offered many models of telescopes over the years, distinctive for their apertures and optical designs as well as for their brief periods of production and irregular availability before being discontinued. Past product lines include refractors up to 206mm in aperture, a catadioptric
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Astro-Physics (A-P) is almost legendary in the amateur astronomy community, mainly because of the outstanding apochromatic refractors this
Illinois company produces.
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that Astro-Physics is "a name immediately recognizable to the connoisseur of fine refractors on rock-steady mounts".
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Choosing and Using a New CAT: Getting the Most from Your
Schmidt Cassegrain or Any Catadioptric Telescope
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Star Ware: The
Amateur Astronomer's Guide to Choosing, Buying, and Using Telescopes and Accessories
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Star Ware: The
Amateur Astronomer's Guide to Choosing, Buying, and Using Telescopes and Accessories
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Classic
Telescopes: A Guide to Collecting, Restoring, and Using Telescopes of Yesteryear
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This article is about the telescope maker. For the scientific discipline, see
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The company is owned by Roland and
Marjorie Christen. Author and
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contributing editor Philip S. Harrington wrote in his 2011 book
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engineer Roland
Christen, the company is noted for its line of
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as well as high-end mounts. The company is located in
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370:Companies based in Winnebago County, Illinois
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285:"Astro-Physics to be profiled on TV show"
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210:Harrington, Philip S. (2011-02-05).
216:(4 ed.). Hoboken, New Jersey:
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324:. 2006-07-20. Archived from
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247:English, Neil (2012-08-30).
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133:Gary, Alex (2006-10-26).
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385:Telescope manufacturers
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290:Rockford Register Star
140:Rockford Register Star
50:Sundstrand Corporation
27:Telescope manufacturer
218:John Wiley & Sons
165:Mollise, Rod (2009).
257:. pp. 184–185.
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18:Astro-Physics, Inc.
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