Light Pollution Filter Before And After

These can be screwed on to a camera adapter eyepiece or onto a diagonal.

Light pollution filter before and after.

So i set out to understand if and when light pollution filters are useful. Light pollution filters are typically 1 25 or 2 round filters that screw into your telescope to reduce the effects of light pollution on your viewing or imaging. Schneider 77mm true cut 750 ir filter blocks 50 of light at 750nm and progressively eliminates ir after 750nm preventing infrared light pollution. The first night turned out pretty bad because of the cloud cover but happens that it was a good time to test out some light pollution filters just to see how they perform in purely getting rid of the light pollution.

You can find out the bortle scale class of your home using a light pollution map or my favorite the clear outside mobile app by first light optics. Before and after photos show the dramatic effect lockdowns are having on pollution around the world one third of the world is under lockdown as a response to the coronavirus pandemic. Schneider offers another version that is targeted at the 680nm range. These lights are still quite common and until they are eliminated altogether light pollution filters will probably be the first line of defense against the color shifts they cause in photographs.

Yes light pollution filters are very helpful in certain situations. After some deep testing experimenting in post processing and hours thinking about the issues i have some observations and suggestions for you. Before the widespread adoption of led street lighting high pressure sodium vapor was the most common form of street lighting used worldwide. When looking for a light pollution filter it is important not to be confused with contrast boosting filters or those that only block out a limited range of light or an entire range for that matter.

Before we get started i should mention that the effectiveness of a particular light pollution filter will depend on your imaging location. Here is a set of images shot with and without the filter straight out of the camera sooc shot at. What is a light pollution filter. The best and most recommended way to identify a cheap filter is to look for or look at the charts that come with it and that are cited.

Here are a few before and after images that show the filter in action.