Quote:
Originally Posted by xiongz
Hi Marin,
This is really good. I searched Helix images on the net when I was checking on mine. Your details were just as good as best ones out there. I thought long subs would be better but yours with 3min seemed to be just fine (even at F5), and 3nm filters do work well for nebulae under B8 skies.
John
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Thanks John,
Most folk advise to push longer subs in the order of 5 to 10 minutes or longer but I disagree in relation to the 2600MM camera , very faint targets under B8 skies or with smaller shorter focal length scopes. Maybe for larger brighter targets but not dim targets, you’re always fighting with the noise floor.
The sweet spot for my rig using the Antlia 3nm filters is 3 min
Martin