{"product_id":"gregorian-secondary-mirror-f3370","title":"Gregorian secondary mirror","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, with slight scratches and has no cover. William Herschel made and used Gregorian telescopes before moving on to Newtonian and later Herschelian (to his own design) telescopes.\u003cbr\u003eSir William Herschel","brand":"prodigi","offers":[{"title":"Fine art poster \/ XS: 30 x 20cm \/ none","offer_id":57028371513726,"sku":"GLOBAL-FAP-8X12","price":22.95,"currency_code":"GBP","in_stock":true},{"title":"Fine art poster \/ S: 45 x 30cm \/ none","offer_id":57028371546494,"sku":"GLOBAL-FAP-12X18","price":28.95,"currency_code":"GBP","in_stock":true},{"title":"Fine art poster \/ M: 60 x 40cm \/ none","offer_id":57028371579262,"sku":"GLOBAL-FAP-16X24","price":38.95,"currency_code":"GBP","in_stock":true},{"title":"Fine art poster \/ L: 75 x 50cm \/ none","offer_id":57028371612030,"sku":"GLOBAL-FAP-20X30","price":54.95,"currency_code":"GBP","in_stock":true},{"title":"Fine art poster \/ XL: 90 x 60cm \/ none","offer_id":57028371644798,"sku":"GLOBAL-FAP-24X36","price":69.95,"currency_code":"GBP","in_stock":true},{"title":"Fine art poster \/ XXL: 150 x 100cm \/ none","offer_id":57028371677566,"sku":"GLOBAL-FAP-40X60","price":82.95,"currency_code":"GBP","in_stock":true},{"title":"Framed picture \/ XS: 40 x 30cm \/ none","offer_id":57028371710334,"sku":"MUS-CFPM-12X16","price":59.95,"currency_code":"GBP","in_stock":true},{"title":"Framed picture \/ S: 60 x 45cm \/ none","offer_id":57028371743102,"sku":"MUS-CFPM-18X24","price":79.95,"currency_code":"GBP","in_stock":true},{"title":"Framed picture \/ M: 75 x 50cm \/ none","offer_id":57028371775870,"sku":"MUS-CFPM-20X30","price":119.95,"currency_code":"GBP","in_stock":true},{"title":"Framed picture \/ L: 90 x 60cm \/ none","offer_id":57028371808638,"sku":"MUS-CFPM-24X36","price":159.95,"currency_code":"GBP","in_stock":true},{"title":"Framed picture \/ XL: 100 x 70cm \/ none","offer_id":1847901454380,"sku":"MUS-CFPM-28X40","price":204.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Standard: 6 x 4in \/ Single","offer_id":57028371841406,"sku":"GLOBAL-POST-MOH-6X4","price":1.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Standard: 6 x 4in \/ 10-pack","offer_id":57028371874174,"sku":"GLOBAL-POST-MOH-6X4-10","price":14.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Standard: 6 x 4in \/ 20-pack","offer_id":57028371906942,"sku":"GLOBAL-POST-MOH-6X4-20","price":24.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Large: 7 x 5in \/ Single","offer_id":57028371939710,"sku":"GLOBAL-POST-MOH-7X5","price":2.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Large: 7 x 5in \/ 10-pack","offer_id":57028371972478,"sku":"GLOBAL-POST-MOH-7X5-10","price":19.95,"currency_code":"GBP","in_stock":true},{"title":"Postcard \/ Large: 7 x 5in \/ 20-pack","offer_id":57028372005246,"sku":"GLOBAL-POST-MOH-7X5-20","price":29.95,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Standard: 6 x 4in \/ Single","offer_id":57028372038014,"sku":"GLOBAL-GRE-MOH-6X4-BLA","price":2.5,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Standard: 6 x 4in \/ 10-pack","offer_id":57028372070782,"sku":"GLOBAL-GRE-MOH-6X4-BLA-10","price":15.95,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Standard: 6 x 4in \/ 20-pack","offer_id":57028372103550,"sku":"GLOBAL-GRE-MOH-6X4-BLA-20","price":26.95,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Large: 7 x 5in \/ Single","offer_id":57028372136318,"sku":"GLOBAL-GRE-MOH-7X5-BLA","price":3.5,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Large: 7 x 5in \/ 10-pack","offer_id":57028372169086,"sku":"GLOBAL-GRE-MOH-7X5-BLA-10","price":19.95,"currency_code":"GBP","in_stock":true},{"title":"Greetings card \/ Large: 7 x 5in \/ 20-pack","offer_id":57028372201854,"sku":"GLOBAL-GRE-MOH-7X5-BLA-20","price":33.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2785\/2654\/files\/f3370.jpg?v=1772718322","url":"https:\/\/prints.rmg.co.uk\/products\/gregorian-secondary-mirror-f3370","provider":"Royal Museums Greenwich prints","version":"1.0","type":"link"}