[xelasnave]

Try 120 at 30 or 60 seconds you will be surprised ...it has a lot to do with total exposure a d you can do that at many different exposure speeds.
I was forced to do the best with 30 seconds..I built up near three hours over diffet sessions...not realising I could stack the lot in time...but this new computer manages huge deep sky stacker loads...but I was really surprised by my last Lagoon I posted given it was 30 seconds at an iso so high I never would use it in yhe old days...anys all at 1600 iso.
So approx 3 hours of 30 second captures...and that image had very little noise ti start with I expect because there were so many captures.
O ject movement minimised noise and startools seems to help big time with noise reduction in other images that have had bad noise.... No darks flats or ias for that image either...
I see short exposures as a popr mans adaptive optics..sooner or later you get a decent 30 capture and if you build up a big bank of them and stack your best ot sortta works well given bad polar align.
Alex