Quote:
Originally Posted by gregbradley
I haven't found NB working ideally under a full moon with 5nm Astrdons. Perhaps 3nm do. I see a drop in contrast when the moon is too bright or too close to the object being imaged. I still see best Ha under dark skies but it does work quite well under bright moon and light pollution. Dark skies are always better and usually better seeing as well (I am sure the concrete jungle messes up the atmosphere's stability).
Greg.
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Can't say I've ever seen any NB issues from urban skies, as the sky background (at SII, Ha and OIII emission line frequencies) is effectively identical to rural ones.
Also provided you a good angular distance from it, the moon has little effect.
But , sure, at under 40 or so degrees you will see either gradients or even instrument scattering effects getting worse as you progressively get closer to the moon.
(I've had my fair share of capturing (near moon) data with weird flares thinking "WTF!! ??"
)
OIII is worst offender. SII and H-a seem more immune.
I'm not alone here, there have been healthy discussions and analysis elsewhere.
e.g.
http://www.cloudynights.com/topic/49...-moons-impact/