{"id":1026,"date":"2012-09-01T17:28:01","date_gmt":"2012-09-01T16:28:01","guid":{"rendered":"http:\/\/dianajuncher.dk\/astrophoto\/?p=1026"},"modified":"2012-09-02T11:07:15","modified_gmt":"2012-09-02T10:07:15","slug":"zoom-zoom-zoom","status":"publish","type":"post","link":"http:\/\/dianajuncher.dk\/astrophoto\/2012\/09\/zoom-zoom-zoom","title":{"rendered":"Zoom, zoom, zoom"},"content":{"rendered":"

I have gotten my hands on a 28-200mm zoom lens from Tamron. I borrowed it from one of my new colleagues at the Niels Bohr Institute where I have just started as a PhD student.<\/p>\n

\"\"<\/a>This is the first time I have had access to such a long focal length and as chance would have it, the moon was full last night. Since I had no prior experience with such a bright object I did a whole lot of bracketing, varying the f-stop, ISO and shutter speed. The image on the left is among the best in the batch: 200mm focal length, f\/32, ISO 100 and a shutter speed of 1\/40 seconds. It is not very sharp, though. I think it is because there was a thin cover of clouds.<\/p>\n

I then took a series of photos of the stars Arcturus and Capella. They are both very bright and their scintilation due to atmospheric turbulence is therefore very clear.\u00a0I took some long exposures while moving the camera around, thus capturing their varying brightness and colors. The photo below is of Capllea. It is a 10 second exposure at 200mm with f\/5.6 and ISO 400.<\/p>\n

\"\"<\/a><\/p>\n

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

I have borrowed a 28-200mm zoom lens from one of my new colleagues. This is the first time I have had access to such a long focal length. I took a closer look at the full moon and played around with the twinkling of Arcturus and Capella.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[15,19],"tags":[],"_links":{"self":[{"href":"http:\/\/dianajuncher.dk\/astrophoto\/wp-json\/wp\/v2\/posts\/1026"}],"collection":[{"href":"http:\/\/dianajuncher.dk\/astrophoto\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/dianajuncher.dk\/astrophoto\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/dianajuncher.dk\/astrophoto\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/dianajuncher.dk\/astrophoto\/wp-json\/wp\/v2\/comments?post=1026"}],"version-history":[{"count":12,"href":"http:\/\/dianajuncher.dk\/astrophoto\/wp-json\/wp\/v2\/posts\/1026\/revisions"}],"predecessor-version":[{"id":1059,"href":"http:\/\/dianajuncher.dk\/astrophoto\/wp-json\/wp\/v2\/posts\/1026\/revisions\/1059"}],"wp:attachment":[{"href":"http:\/\/dianajuncher.dk\/astrophoto\/wp-json\/wp\/v2\/media?parent=1026"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/dianajuncher.dk\/astrophoto\/wp-json\/wp\/v2\/categories?post=1026"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/dianajuncher.dk\/astrophoto\/wp-json\/wp\/v2\/tags?post=1026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}