Light Pollution

2 posts


Experiments with LP Filters on M101

Some of you know that I have been taking way too many subs of M101 recently.  If you don’t want to know what I learned about light pollution filters, then just skip to the fourth photo and enjoy M101.   The idea was to see how well the Baader Light Pollution Moonglow filter with IR cut works.  I was also wanting to compare taking shorter subs (60-90 seconds) at 240 gain with longer guided subs at 90 gain.    Here are the results:   Looking very closely at the details, I think the second and fourth pictures are very similar. […]

POV Special – The City Dark – PBS Premiere July 5th (Online July 6 – August 5)

Greetings fellow astrophiles, Prof. John McMahon sent along the following announcement well before an actual commercial made its way to my airwaves: Ian Cheney’s highly-acclaimed documentary “The City Dark” about the loss of the night sky will air on PBS’s program “POV” (Point of View) this July 5. Please disseminate this info to those you know, both astro-types and others … since public awareness of light pollution’s numerous adverse effects is the first step to reducing it. The special airs on WCNY-TV at 10 p.m. on July 5th, 2 a.m. on WCNY-2, and at the POV website through August 5th. […]