Light Pollution
Plan your observation and imaging sessions using interactive maps and learn the best techniques and filter recommendations to beat the city glow.
Official Interactive Map
Visit LightPollutionMap.info, the most comprehensive interactive light pollution map in the world. Easily locate dark sky sites, calculate the Bortle class of your target locations, and plan your next astrophotography getaway.
RecommendedEducational Videos & Guides
Light Pollution Filters Review and Comparison
An in-depth review comparing broadband anti-light pollution filters (like Optolong L-PRO) with narrowband nebula filters (L-Enhance, L-Extreme).
Deep Sky Astrophotography under Bortle 7 & 8 Skies
A practical guide showing how to image deep-sky objects using regular DSLRs from highly light polluted urban backyards.
City vs Country: Astrophotography Sky Comparison
A direct side-by-side comparison imaging the same celestial target from downtown Tokyo (Bortle 9) vs a rural dark sky site.
Astro-Imaging Under Light Pollution: What's Possible?
An educational video detailing the realistic imaging expectations and limits of modern telescope rigs under light polluted skies.
I Tested Light Pollution Maps - How Accurate Are They?
An in-depth field test comparing the predictions of online light pollution maps against physical Sky Quality Meter (SQM) readings.
Milky Way from Every Light Pollution Level
Nico Carver of Nebula Photos compares real-world imaging results of the Milky Way galaxy from Bortle 1 all the way to Bortle 9.