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Thanks , yes I use the Atlas too.
It’s not just LED street lights but population growth and population density ( infrastructure in general) that’s causing LP to increase at alarming rates every couple of years. If you live in Rural or semi rural areas or towns , try imaging towards the centre of Sydney’s Light Dome it will test your patience for the hobby , not to mention neighbours who leave their backyard flood lights on until after midnight.
Your camera sensor will tell you how severe LP is in your location
In Sydney I’m imaging under B8 , using a luminance filter during new moon , a 30 sec sub is virtually a white out , off the Richter scale whereas down south at my Dome under B3, I can shoot 2 min luminance subs and the Histogram is well within range. Same camera 2600MM , same Gain and offset , but with a bigger light bucket 10” f5 Carbon Newt.
Sydney B8 and South Coast Rural B3 are simply chalk and cheese.
Those who live in B1 to B4 are truly blessed in this wonderful hobby of ours.
I haven’t observed in Sydney for years , my 12” Dob has been down at my B3 rural home since 2018.
Martin
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