I just was curious how you guys determine the ratio between filters (narrowband + broadband or just narrowband). I have a hard time really knowing what I’m doing when I say I’m gonna shoot this amount of Ha vs this amount of anything else. Where can I check to see the amount per filter I should be capturing? Is there a normal ratio or does it differ with each target.
How to determine proper exposure ratios between narrowband and broadband filters
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You'd want all channels to have the same SNR. Hardly ever you get to achieve that.
Ideally what Andrea said is the goal. I think what you want to shoot for is getting good signal from all the filters. How you combine the data will take care of the rest. Short answer is, don’t stress about it, just get good data that results in a decent SNR from each filter.