What is a light pollution filter.
Celestron light pollution filter review.
While light pollution is a constant frustration modern technology can also give back at least a little to frustrated stargazers light pollution filters which are sophisticated glass optical filters with dozens of layers of carefully deposited dielectric coatings can reduce the effects of some types of urban lighting for visual observation of some deep sky objects especially those such as.
At 305 square miles that is more than 820 street lamps per square mile.
The design of the filter includes layers that block specific bandpass lines of the visible spectrum.
The advanced technology coatings enable the filter to achieve an outstanding transmission of over 97 across the entire bandpass with total blockage of prominent light pollution lines.
The light pollution imaging lpi filter for the 8 rasa blocks light from some of the most common sources of light pollution between 400 700nm i e the visible spectrum including high and low pressure sodium vapor streetlights mercury vapor streetlights and natural airglow caused by oxygen in the atmosphere.
These can be screwed on to a camera adapter eyepiece or onto a diagonal.
The perfect filter for viewing nebula from light polluted skies or for boosting the contrast of nebula from dark sky sites.
Light pollution comes from any artificial light be it on a suburban porch or a city street lamp.
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.
A light pollution telescope filter is probably the most generic of these types of filters and is designed to block out certain wavelengths of light such as the light being created by sodium vapor mercury fluorescent and other man made sources of light that are typically found in outdoor lighting.
The light pollution imaging lpi filter for the 8 rasa blocks light from some of the most common sources of light pollution between 400 700nm i e the visible spectrum including high and low pressure sodium vapor streetlights mercury vapor streetlights and natural airglow caused by oxygen in the atmosphere.
