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Description: | A circular concave mirror made as a secondary mirror for a Gregorian telescope. This secondary mirror has a brass mount. It has a good polish except at the edge and has no cover.
William Herschel made and used Gregorian telescopes before moving on to Newtonian and later Herschelian (to his own design) telescopes.
AUDITED.
caption: Gregorian secondary mirror | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | Gregorian telescopes Gregorian telescope A Catalogue of Instruments made and (or) used by Sir William Herschel as Preserved at Slough & examined ther in 1924 May & June A Peep into Herschel's Workshop telescope mirrors | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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