Hi all, I'm sure I've read this before somewhere but still unsure of the theory ...
Am I correct in thinking that when stacking, 1 to 2 Half's the noise, then 2 to 4 Half's again, then 4 to 8 ... 8 to 16 etc.
So going past 16 really needs a massive investment in time ?
Also where does sub length come into this ? I use a ZWO 1600 pro and seem to get good results in my bortle 7 / 8 zone with 300 seconds at unity gain.
Also, now sure that (as I've been told but wanted to see for myself ) that only Ha cuts through the Moon glow.
Due to t