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Hi Chris
I have never worked out what that "distance" means. No I am not in Nova
Scotia but I am sure the imaging conditions would be much better than at Thornleigh in Sydney near Pennant Hills road and its highway sodium lamps. So Kellyville Ridge seems good by comparison.
However, I notice that the Neodymium filter has a nice big dip in the sodium light range. I have an IDAS light pollution filter which is good in this respect but it rather severely cuts back all the spectrum as well. I understand from reports that the Neodymium filter works very well in comparison and does not have such a severe cut back on the rest of the spectrum.
As for reduction in Moon skyglow I had visions of being able to image during bright Moon periods as I am getting a bit desperate with yet another dark Moon period slipping away with little imaging opportunities!
However, your comment on some reduction of Moon skyglow may tempt me to get one of these filters as the price seems reasonable.
Thanks for your advice.
Cheers Peter
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