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I suppose for LRGB imaging, taking 24x5min Lum subs for an image, then taking 12x10min lum subs on the same night would be a good way of testing it out.. same total exposure time, same seeing (especially if you were to take 1x5min, 1x10min, 1x5min etc..) same optics, similar ambient temperature etc.. But seeing would also come into play.. seeing will degrade a 10min sub twice as bad as it will a 5 min sub.. It would be hard to do a direct comparison... I suppose its one thing that KAF-8300 users will have to work out for themselves.. what works best for them given their optics, filters, seeing conditions etc...
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