{"id":69,"date":"2012-04-19T21:25:58","date_gmt":"2012-04-19T21:25:58","guid":{"rendered":"http:\/\/www.cantabsoftware.co.uk\/astrodb\/?p=69"},"modified":"2012-04-19T21:31:19","modified_gmt":"2012-04-19T21:31:19","slug":"saturn-17-april-2012","status":"publish","type":"post","link":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/?p=69","title":{"rendered":"Saturn 17 April 2012"},"content":{"rendered":"

I took a number shots of Saturn (which was at opposition 2 days ago on 15 April). Its not very high in the sky so I took the shots around midnight to get the maximum altitude. The computer disc was filling up with large AVI files and, in my sleepy state, managed to accidentally delete the images I took with a x2 and x5 Barlow lens. So the image below is at prime focus and therefore somewhat small -but what’s the magnification? Magnification is really concerned with the angular view of the object when seen with the optical aid compared to the unaided view. A rough guide is to consider a 50mm lens produces a magnification of 1 when used with a camera (or ccd sensor). So at prime focus, a rough guide is the telescope focal length (mm) divided by 50 (mm). So for my VX14 with \u00a0its 1600mm focal length this is about 32 at prime focus. Saturn at about 20″ arc would cover approximately 1\/30 of the width of my DMK21AU04.AS chip.<\/p>\n

I am waiting for the next clear night so I can try this again with a x2 and x5 Barlow lens and this time I have plenty of disc space \ud83d\ude42<\/p>\n

\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

I took a number shots of Saturn (which was at opposition 2 days ago on 15 April). Its not very high in the sky so I took the shots around midnight to get the maximum altitude. The computer disc was … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[13],"class_list":["post-69","post","type-post","status-publish","format-standard","hentry","category-astrophotos","tag-saturn"],"_links":{"self":[{"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=\/wp\/v2\/posts\/69","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=69"}],"version-history":[{"count":8,"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=\/wp\/v2\/posts\/69\/revisions"}],"predecessor-version":[{"id":79,"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=\/wp\/v2\/posts\/69\/revisions\/79"}],"wp:attachment":[{"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=69"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=69"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=69"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}