{"id":45850,"date":"2023-06-07T07:33:42","date_gmt":"2023-06-07T07:33:42","guid":{"rendered":"https:\/\/www.skyatnightmagazine.com\/?p=118919"},"modified":"2023-06-07T08:32:29","modified_gmt":"2023-06-07T08:32:29","slug":"how-to-calculate-and-alter-a-telescopes-magnification","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/rss_feed\/how-to-calculate-and-alter-a-telescopes-magnification\/","title":{"rendered":"How to calculate and alter a telescope\u2019s magnification"},"content":{"rendered":"

A quick guide to magnification and how to alter it by changing your eyepiece. <\/p>

By Steve Richards\n \t\t<\/p>

Published: Wednesday, 07 June 2023 at 12:00 am<\/p>

\n\n

The magnification of a telescope is worked out by dividing the focal length<\/a> of the telescope by the focal length of the eyepiece<\/a> in use.<\/p>\n

So, for example, a telescope with a focal length of 750mm used with an eyepiece of 15mm focal length will have a magnification of 50x.<\/p>\n

You cannot alter the focal length of a telescope, but you can alter the magnification by changing the eyepiece to one with a longer or shorter focal length.<\/p>\n

With the same telescope, an eyepiece with a focal length of 10mm would yield a magnification of 75x, while an eyepiece with a focal length of 25mm would give 30x.<\/p>\n

For more info, read out guide to telescope stats<\/a>.<\/p>\n

Email your astronomy queries to us via contactus@skyatnightmagazine.com<\/a> and they could appear in a future issue of BBC Sky at Night Magazine.<\/strong><\/em><\/p> <\/body><\/html>\n

","protected":false},"excerpt":{"rendered":"

A quick guide to magnification and how to alter it by changing your eyepiece. <\/p>\n","protected":false},"author":24,"featured_media":45851,"template":"","categories":[1],"acf":{"readingTimeMinutes":"< 1"},"uagb_featured_image_src":{"full":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2023\/06\/how-to-calculate-and-alter-a-telescopes-magnification.jpg",1200,969,false],"thumbnail":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2023\/06\/how-to-calculate-and-alter-a-telescopes-magnification-150x150.jpg",150,150,true],"medium":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2023\/06\/how-to-calculate-and-alter-a-telescopes-magnification-300x242.jpg",300,242,true],"medium_large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2023\/06\/how-to-calculate-and-alter-a-telescopes-magnification-768x620.jpg",768,620,true],"large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2023\/06\/how-to-calculate-and-alter-a-telescopes-magnification-1024x827.jpg",800,646,true],"1536x1536":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2023\/06\/how-to-calculate-and-alter-a-telescopes-magnification.jpg",1200,969,false],"2048x2048":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2023\/06\/how-to-calculate-and-alter-a-telescopes-magnification.jpg",1200,969,false]},"uagb_author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/author\/importmanagerhubsprylab-com\/"},"uagb_comment_info":0,"uagb_excerpt":"A quick guide to magnification and how to alter it by changing your eyepiece.","_links":{"self":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/rss_feed\/45850"}],"collection":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/rss_feed"}],"about":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/types\/rss_feed"}],"author":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/users\/24"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/media\/45851"}],"wp:attachment":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/media?parent=45850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/categories?post=45850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}