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Of course there is a massive amount of downsampling of images posted on the web, but the Einstein in the above thread couldn't even acknowledge the detail of 100% crops...
I read an interesting comment on Cloudy Nights a while ago. It added up all the data involved in producing an LRGB image including dark and flat frames. It often exceeds a gigabyte of data, which we then reduce to 200kb to post on a forum!
DT
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