Best Light Pollution Filter

The best light pollution filters make it possible to capture pin sharp astro images even in a city.

Best light pollution filter.

So here are the filters. If those filters qualified as a light pollution filter so would a piece of glass spray painted black blocking all light. Best light pollution filter for astrophotography. All filters are available in both 1 25 31 75mm and 2 50 8mm.

Most experienced observers agree that a narrowband filter filter one that passes h beta and oiii emission in the blue green while blocking h alpha and light from sodium and mercury vapor lamps is the best all around light pollution or nebula filter for visual observation. The only difference is size the same features still apply. The design of the filter includes layers that block specific bandpass lines of the visible spectrum. A quality light pollution filter will allow the important colors and light emitted by your astrophotography subject to reach the camera sensor without the nasty brown glow of a washed out sky.

An easy way to rule out cheap filters that claim to be the best light pollution filters but really are not is that any real filter will come with a chart showing what wavelengths of light are blocked and which are not. The light pollution emitted by street lamps illuminated signs houses cars and everything else that makes a city what it is will usually make it so you an barely spot a single star in the sky never mind constellations planets or anything else. You can access each size on amazon via the table at the top of this buyers guide.