Quote:
Originally Posted by troypiggo
Thanks mate. That's what I'm experimenting with. Wondering if it's 7 times longer subs (or some fraction of that), or 7 times as many subs of same length.
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Quote:
Originally Posted by RobF
I guess the other way of attacking it might be some sort of numeric estimate of signal to noise ratio. Then use usual means to get sufficient SNR for SII and OIII vs Ha (dependent on skyglow coming through bandpass for each filter, exposure length, total exposure time, value of Drachma, etc!)
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I suspect that good enough is just that. If you have enough SNR with your Sii and Oiii to stretch without bringing up too much noise in those channels then you can bring up their levels to your Ha. Or meet half way. Lower the Ha and reach up with Sii and Oiii. Regardless of what colour your original blend turns out to be, which is mostly green anyway, your ability to bring up the colors Red and Blue from the other channels will only depend on how much data quality data is in there. Not its
strength. If it's not noisy and you have a reasonable SNR then it's good enough IMHO.