Quote:
Originally Posted by Craig_
Thanks 
... I guess the reason I don’t already have one is that Sii has a rep for being a fairly weak emission on most objects and given with an OSC I’d only be using 25% of the pixels to gather Sii data, I imagine I’d need very long subs and a large amount of total integration to gather anything useful in all but the richest Sii objects? |
Spot on. It's a bit like hunting for truffles. One needs to be seriously addicted for it to be worth the effort. We've got 20 inches of aperture and a 16 bit CCD mono camera, but we still need to throw a full night of half-hour subs at the SII, often 2x2 binned (which latter doesn't apply to ZWO cameras where it won't help).
Lately we've realized how beautiful galaxies are, even how beautiful globular and open clusters can be, if you're really careful with the colour. Perhaps we're starting to lose the narrowband/SII faith.