Comments on: No telescope, no problem! Canon 7D doing astronomy http://awtlblog.vitsco.com/2010/01/no-telescope-no-problem-canon-7d-doing-astronomy/ Our world through the lenses. Wed, 08 Feb 2012 19:27:43 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: phoenix http://awtlblog.vitsco.com/2010/01/no-telescope-no-problem-canon-7d-doing-astronomy/comment-page-1/#comment-243 phoenix Sun, 16 Oct 2011 16:42:32 +0000 http://awtlblog.vitsco.com/?p=3051#comment-243 No I don't use any moon light filters. If you get all white in your moon shot, it's probably because your camera's automatic exposure calculation is over exposing the moon. Keep in mind that yes the frame is mostly black, but the moon is in fact really really bright. Your average camera's automatic exposure will try to make the black scene more like 15% gray. But in this particular case, your want the sky to be dark, close to 100% dark. So the automatic exposure in this case always over exposed it by 15% or so. What you need is to either dial in some exposure compensation, or in my case, I use manual exposure, I started with some value that I think it's good, take a quick shot just to check the exposure. I look at the histogram until I see that I have most of the parts in black and the rest are not hitting 100%, I adjust if necessary until I get a good exposure setting. Then I try to frame for the shot. No I don’t use any moon light filters. If you get all white in your moon shot, it’s probably because your camera’s automatic exposure calculation is over exposing the moon. Keep in mind that yes the frame is mostly black, but the moon is in fact really really bright. Your average camera’s automatic exposure will try to make the black scene more like 15% gray. But in this particular case, your want the sky to be dark, close to 100% dark. So the automatic exposure in this case always over exposed it by 15% or so. What you need is to either dial in some exposure compensation, or in my case, I use manual exposure, I started with some value that I think it’s good, take a quick shot just to check the exposure. I look at the histogram until I see that I have most of the parts in black and the rest are not hitting 100%, I adjust if necessary until I get a good exposure setting. Then I try to frame for the shot.

]]> By: Dean Bousfield http://awtlblog.vitsco.com/2010/01/no-telescope-no-problem-canon-7d-doing-astronomy/comment-page-1/#comment-242 Dean Bousfield Sun, 16 Oct 2011 10:22:10 +0000 http://awtlblog.vitsco.com/?p=3051#comment-242 Fantastic photos but I was just wondering if you use some kind of moon light filter because all of my pictures just have the moon as a bright ball and I was just wondering how you managed to get the details because I just get white. Many thanks, Dean Fantastic photos but I was just wondering if you use some kind of moon light filter because all of my pictures just have the moon as a bright ball and I was just wondering how you managed to get the details because I just get white.

Many thanks,

Dean

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