. questar corporation type private industry manufacturing founded 1950 headquarters new hope pennsylvania usa key people donald j. bandurick president and ceo products optical mechanical devices website www.questarcorporation.com questar corporation is a company based in new hope pennsylvania which manufactures precision optical devices for consumer industrial aerospace and military markets . questars have been associated with many well known scientists and other personalities ; for example in 1959 wernher von braun purchased a telescope manufactured by the company . 1 contents 1 the questar 3 1 2 maksutov cassegrain 2 references 3 further reading 4 external links the questar 3 1 2 maksutov cassegrain edit questar 3 in development since 1946 the questar 3 1 2 has been the company s most notable product . braymer s basic concept for the telescope was one of portability compactness and ease of use . he used a catadioptric maksutov design named after its inventor dmitry maksutov for the optical tube assembly . braymer used a modified cassegrain design that added an aluminized spot to the maksutov corrector plate creating a compact folded light path this design is sometimes called a spot maksutov . to avoid a conflict with a design patent held by john gregory licensed to perkin elmer braymer put the secondary spot on the outer r1 surface of the corrector lens . in the mid 1960s the patent issue was settled and questar s maksutov cassegrains after that time use the gregory design with the aluminized spot on the inside of the corrector r2 . 2 the design was originally envisioned as a 5 inch 130 mm telescope but it was decided a telescope of that size would not fit the market they were aiming for since it would be too heavy and expensive . 3 references edit kennedy space center s amateur astronomers a telescope from history owned by dr. wernher von braun telescopeoptics.net 10.2.3.3 . maksutov cassegrain telescope questar maksutov cassegrain a design very similar to gregory s in order to avoid patent infringement questars had for about a decade the aluminized spot placed at the front meniscus surface paul yates the questar cosmos hebden bridge astronomy society page 7 september 2000 further reading edit sky & telescope magazine november 2002 s & t test report the questar 50th anniversary edition telescope external links edit questar corporation s website company seven s questar library historical reprints of advertising and brochures and patents for questar telescopes articles about antique questar telescopes and accessories in their museum display . retrieved from https en.wikipedia.org w index.php title questar corporation & oldid 743815321 categories 1950 establishments in pennsylvaniacompanies based in bucks county pennsylvaniamanufacturing companies established in 1950telescope manufacturersmanufacturing companies based in pennsylvaniaamerican companies established in 1950privately held companies based in pennsylvania navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version languages deutschfran ais edit links this page was last modified on 11 october 2016 at 12 15 . text is available under the creative commons attribution sharealike license ; additional terms may apply . by using this site you agree to the terms of use and privacy policy . wikipedia is a registered trademark of the wikimedia foundation inc. a non profit organization . privacy policy about wikipedia disclaimers contact wikipedia developers cookie statement mobile view