[DIYman (Doug)]

Hi members. I know the reasoning behind the need to take Dark Flats. However, what I am unsure about is when taking Flats where the exposure lengths differ slightly, between LRGB filters, do you need to take a set of Dark Flats (for each filter ) using the same exposure as for each respective Flat? If this is the case, then there will be a set of Flats as well as a set of Dark Flats for each filter.