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RG & B exposures - to register star colours
Posted 12 March 2012 - 12:36 PM
I have seen several images with colourful backdrops and yet colour in the stars too. To get the backdrop colour, my stars are clipping in the RG and B channels.
For instance I was imaging Rosetta Nebula last night - a 10 min Ha sub exposure was good enough to register the nebulosity above the noise floor - but even a 1 min R, G or B exposure was clipping many stars in the central cluster - yet offered no hint of detail at all in the background.
I found some images on the web with a different setup - which assumed 30min subs for Ha and 15min for R, G and B. The stars had fantastic colour too.
Is there a trick I'm missing?
Hardware :some stuff and then some more stuff, in fact, too much stuff altogether. Software: same as hardware... to much stuff
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