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Everything posted by shaunster
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From the album: Astro imaging
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......& then the heavens cleared.....
shaunster commented on LDUNN1's gallery image in Member's Album
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NGC6992 Great conditions, but not enough time... 4x 300 sec subs ISO 800 and 2XDarks to match.
shaunster commented on Keiran's gallery image in Member's Album
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From the album: Astro imaging
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From the album: Astro imaging
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NGC 6960 09-07-2011 27 mins, made up of some 5mins and some 1 mins ISO 400 and 800. CLOUDY :(
shaunster commented on Keiran's gallery image in Member's Album
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The nebulosity comes with time, 2 minute exposures on a DSLR and I presume its unmodded wont capture much if any, if you shot at a particulary bright target such as orion M42 then you will see the nebulosity apear, but generally to capture the fainter type backgroun nebulosity ( like that around deneb) then long exposures are needed. If polar allignment is off the image will appear to rotate around its centre, the stars in the centre stay round and the outer ones rotate around it, a bit like star trails There is a lot of nebulosity around the star Sadr which is near deneb, if you shot for this and took longer and more exposures then you should see something and the more exposures you get will help smooth the image out. Aim for at least 20 subs at the longest exposure you can get without trailing and then stack and process and see what you get. The more subs you get the easier it is to create a better final image.
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From the album: Astro imaging