{"id":103,"date":"2012-05-11T08:12:38","date_gmt":"2012-05-11T08:12:38","guid":{"rendered":"http:\/\/www.cantabsoftware.co.uk\/astrodb\/?p=103"},"modified":"2012-05-15T22:24:46","modified_gmt":"2012-05-15T22:24:46","slug":"saturn-29-april-2012","status":"publish","type":"post","link":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/?p=103","title":{"rendered":"Saturn 29 April 2012"},"content":{"rendered":"

Since the 17th April we have had rain and more rain, and, as of 11 May, this was the only break in the weather. Seeing was average at best and I tried to get another shot of Saturn, this time with a barlow lens. Since the image was ‘boiling’ rather a lot, I think the mistake\u00a0I made was to assume that a short exposure, albeit dim, would be superior to a longer exposure that might suffer from atmospheric distortion. The brighter ‘no filter’ images below seem to produce a slightly better result. Saturn is quite low and the light pollution from nearby Royston doesn’t help. Here is a composite RGB image taken with a x2 barlow through the VX14 (although the blue image was so faint\u00a0I did cheat and use the green image again at 50% instead of the blue one\u00a0– it does have a greenish tinge –\u00a0oh well).<\/p>\n

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And then brightened a bit …<\/p>\n

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and then with no filter, so monochrome, but brighter …<\/p>\n

\"\"<\/a>\u00a0and slightly more processed …<\/p>\n

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This just underlines to me that the seeing conditions are, of course, paramount, and that getting a short exposure in the video images\u00a0appears to be counter productive and does not out weigh any atmospheric losses incurred from\u00a0a longer frame exposure time.<\/p>\n","protected":false},"excerpt":{"rendered":"

Since the 17th April we have had rain and more rain, and, as of 11 May, this was the only break in the weather. Seeing was average at best and I tried to get another shot of Saturn, this time … 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-103","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\/103","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=103"}],"version-history":[{"count":4,"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=\/wp\/v2\/posts\/103\/revisions"}],"predecessor-version":[{"id":113,"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=\/wp\/v2\/posts\/103\/revisions\/113"}],"wp:attachment":[{"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=103"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=103"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cantabsoftware.co.uk\/astrodb\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}