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You are right Nick that in our location in Sydney the predominant light pollution is from the city which results from overhead sky glow. I did notice that when I installed my neodymium lpf filter there was a noticeable before/after effect but the sky glow still was predominant. Just something we have to live with and it is amazing what good images we can get under these circumstances. I note that on occasion when I have to get up at 1 or 2 am in the morning how still and relatively clear the skies are but I am a bit too lazy to do imaging at these times! Appeal to the authorities? my cynicism precludes that!
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