Quote:
Originally Posted by Andy01
Thanks Marc, that all makes sense!
I have 5nm Astrodons and a 110mm/ 660ml refractor. I have often imaged from my Melbourne suburban backyard in NB under both LP & Moonlight.
I recently experienced poor results on a recent attempt at the Cat's Paw with the moon close to the nebula. Three night's data was collected but an unresolved, incomplete image, dreadful gradients and nightmare processing were the result - I'm a bit gunshy of shooting under the moon now!
Maybe it's best to choose targets at least 90degrees away from the moon  |
5nm is very good. Problem with moon glow is that if you have a wet night and the sky is a little hazy as a result then there's nothing you can do about it. It'll catch everything. If it's cold and crisp doesn't matter if the moon is even only a few degrees of your field. The only issue is light bouncing on metallic parts of the aperture, vanes or lens holders, filter edges, etc... there are so many parts scattered and stray light can enter your imaging path. Even the back of my primary is not light proof. I just stick a shower cup on it and flock the hell out of everything else. I think Greg Bradley even runs a black marker on the edges of his filters to stop light bouncing. Whatever works.