{"id":261,"count":0,"description":"Schmidt-Cassegrains\r\n\r\nAlthough there are many variations (both mirrors spherical, both mirrors aspherical or one of the two). Can they be divided into two main design forms: compact and non-compact.\r\n\r\nIn its compact form, the corrector plate is located on or near the focus of the primary mirror. In the non-compact, the corrector plate remains at or near the center of curvature (twice the focal length) of the primary mirror.\r\n\r\n[expand title=\"Read more\"]\r\nTypical examples of the compact design are Celestron commercial instruments. Which combine a fast primary mirror and a small, highly curved secondary mirror. This results in a very short tube length, at the expense of the field curvature.\r\n\r\nMost of Celestron's compact designs have a primary mirror with a focus ratio of f \/ 2 and a secondary with a focus ratio of f \/ 5, resulting in a focal ratio of f \/ 10.\r\n\r\nA notable exception is the Celestron C9.25, which has a primary focus ratio of f \/ 2.3. And has a secondary focus ratio of f \/ 4.3. The result is a slightly flatter field and slightly longer tube aspect ratio than most other compact designs.\r\n[\/expand]","link":"https:\/\/dev4-ganymedes.nl\/en\/product-category\/telescopes-en\/telescopes-catadioptric-telescopes-en\/telescopes-catadioptric-schmidt-cassegrains-en\/","name":"Schmidt-Cassegrains","slug":"telescopes-catadioptric-schmidt-cassegrains-en","taxonomy":"product_cat","parent":246,"meta":[],"menu_order":47,"acf":[],"yoast_head":"\nSchmidt-Cassegrains - Ganymedes<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Schmidt-Cassegrains - Ganymedes\" \/>\n<meta property=\"og:description\" content=\"Schmidt-Cassegrains Although there are many variations (both mirrors spherical, both mirrors aspherical or one of the two). Can they be divided into two main design forms: compact and non-compact. In its compact form, the corrector plate is located on or near the focus of the primary mirror. In the non-compact, the corrector plate remains at or near the center of curvature (twice the focal length) of the primary mirror. Read more Typical examples of the compact design are Celestron commercial instruments. Which combine a fast primary mirror and a small, highly curved secondary mirror. This results in a very short tube length, at the expense of the field curvature. Most of Celestron’s compact designs have a primary mirror with a focus ratio of f \/ 2 and a secondary with a focus ratio of f \/ 5, resulting in a focal ratio of f \/ 10. A notable exception is the Celestron C9.25, which has a primary focus ratio of f \/ 2.3. And has a secondary focus ratio of f \/ 4.3. The result is a slightly flatter field and slightly longer tube aspect ratio than most other compact designs.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dev4-ganymedes.nl\/en\/product-category\/telescopes-en\/telescopes-catadioptric-telescopes-en\/telescopes-catadioptric-schmidt-cassegrains-en\/\" \/>\n<meta property=\"og:site_name\" content=\"Ganymedes\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@Ganymedes_NL\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Schmidt-Cassegrains - Ganymedes","robots":{"index":"noindex","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"og_locale":"en_US","og_type":"article","og_title":"Schmidt-Cassegrains - Ganymedes","og_description":"Schmidt-Cassegrains Although there are many variations (both mirrors spherical, both mirrors aspherical or one of the two). Can they be divided into two main design forms: compact and non-compact. In its compact form, the corrector plate is located on or near the focus of the primary mirror. In the non-compact, the corrector plate remains at or near the center of curvature (twice the focal length) of the primary mirror. Read more Typical examples of the compact design are Celestron commercial instruments. Which combine a fast primary mirror and a small, highly curved secondary mirror. This results in a very short tube length, at the expense of the field curvature. Most of Celestron’s compact designs have a primary mirror with a focus ratio of f \/ 2 and a secondary with a focus ratio of f \/ 5, resulting in a focal ratio of f \/ 10. A notable exception is the Celestron C9.25, which has a primary focus ratio of f \/ 2.3. And has a secondary focus ratio of f \/ 4.3. The result is a slightly flatter field and slightly longer tube aspect ratio than most other compact designs.","og_url":"https:\/\/dev4-ganymedes.nl\/en\/product-category\/telescopes-en\/telescopes-catadioptric-telescopes-en\/telescopes-catadioptric-schmidt-cassegrains-en\/","og_site_name":"Ganymedes","twitter_card":"summary_large_image","twitter_site":"@Ganymedes_NL","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"CollectionPage","@id":"https:\/\/dev4-ganymedes.nl\/en\/product-category\/telescopes-en\/telescopes-catadioptric-telescopes-en\/telescopes-catadioptric-schmidt-cassegrains-en\/","url":"https:\/\/dev4-ganymedes.nl\/en\/product-category\/telescopes-en\/telescopes-catadioptric-telescopes-en\/telescopes-catadioptric-schmidt-cassegrains-en\/","name":"Schmidt-Cassegrains - Ganymedes","isPartOf":{"@id":"https:\/\/dev4-ganymedes.nl\/en\/#website"},"breadcrumb":{"@id":"https:\/\/dev4-ganymedes.nl\/en\/product-category\/telescopes-en\/telescopes-catadioptric-telescopes-en\/telescopes-catadioptric-schmidt-cassegrains-en\/#breadcrumb"},"inLanguage":"en-US"},{"@type":"BreadcrumbList","@id":"https:\/\/dev4-ganymedes.nl\/en\/product-category\/telescopes-en\/telescopes-catadioptric-telescopes-en\/telescopes-catadioptric-schmidt-cassegrains-en\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/dev4-ganymedes.nl\/ganymedes-is-de-telescoopwinkel-voor-al-je-optische-instrumenten-en-technieken\/"},{"@type":"ListItem","position":2,"name":"Telescopes","item":"https:\/\/dev4-ganymedes.nl\/en\/product-category\/telescopes-en\/"},{"@type":"ListItem","position":3,"name":"Catadioptric telescopes","item":"https:\/\/dev4-ganymedes.nl\/en\/product-category\/telescopes-en\/telescopes-catadioptric-telescopes-en\/"},{"@type":"ListItem","position":4,"name":"Schmidt-Cassegrains"}]},{"@type":"WebSite","@id":"https:\/\/dev4-ganymedes.nl\/en\/#website","url":"https:\/\/dev4-ganymedes.nl\/en\/","name":"Ganymedes","description":"Ganymedes","publisher":{"@id":"https:\/\/dev4-ganymedes.nl\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/dev4-ganymedes.nl\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/dev4-ganymedes.nl\/en\/#organization","name":"Ganymedes","url":"https:\/\/dev4-ganymedes.nl\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/dev4-ganymedes.nl\/en\/#\/schema\/logo\/image\/","url":"https:\/\/www.ganymedes.nl\/wp-content\/uploads\/2019\/11\/GanymedesLogo_v1_small.png","contentUrl":"https:\/\/www.ganymedes.nl\/wp-content\/uploads\/2019\/11\/GanymedesLogo_v1_small.png","width":450,"height":90,"caption":"Ganymedes"},"image":{"@id":"https:\/\/dev4-ganymedes.nl\/en\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/GanymedesTelescopen\/","https:\/\/x.com\/Ganymedes_NL"]}]}},"_links":{"self":[{"href":"https:\/\/dev4-ganymedes.nl\/en\/wp-json\/wp\/v2\/product_cat\/261","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dev4-ganymedes.nl\/en\/wp-json\/wp\/v2\/product_cat"}],"about":[{"href":"https:\/\/dev4-ganymedes.nl\/en\/wp-json\/wp\/v2\/taxonomies\/product_cat"}],"up":[{"embeddable":true,"href":"https:\/\/dev4-ganymedes.nl\/en\/wp-json\/wp\/v2\/product_cat\/246"}],"wp:post_type":[{"href":"https:\/\/dev4-ganymedes.nl\/en\/wp-json\/wp\/v2\/product?product_cat=261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}