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Are light pollution filters still needed?


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Unfortunately they [ie 'traditional' LPR filters] don't work is the simple answer. LED streetlighting gives off too much at the 'blue end' of the visible spectrum. 

Using a neodymium, UHC or Olll filter should improve your viewing. The Olll maybe overkill on small aperture ‘scopes.

Edited by Philip R
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  • 3 months later...
38 minutes ago, City9Town0 said:

Are light pollution filters still needed?

Lights just added to the garden behind me... my one piece of 'reasonable' Bortle 4 sky is gone.


Put up some kind of screen to keep it out of your garden, only answer really.

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On 04/11/2022 at 08:55, bendiddley said:

Now that most street lights are LED, I'm wondering if light pollution filters are still needed as I was under the assumption that they only filter out the old orange sodium lights?

IDAS D2 filters are useful for LED lights.

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