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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 and brass cover. It has a good polish, but a scratched edge.
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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