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Matching bandpass for narrowband
Last night, along with my new EQ8 (!!), my amazing wife brought home a late birthday present; a 7nm Baader H-alpha filter.
I'd been planning on buying myself a 5nm Ha along with 3nm OIII and SII as I've read that the star sizes are typically different with the different filters and it can cause difficulties when processing them as false colour. 5 for ha and 3 for the others seems to be commonly recommended to get star sizes closer to matching.
Now that I have a 7nm instead of the 5 I was thinking about, what size bandpass should I be looking at for the OIII and SII? Still 3nm? Or would I be better off with something like 5nm now?
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