Light Pollution Reduction (LPR) Filters are designed to selectively reduce the transmission of certain wavelengths of light, specifically those produced by artificial light. This includes mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. sky glow). The new ultra high contrast (UHC) LPR filter has improved contrast over the typical broadband filters. Sky background is darker, and contrast of emission nebulae are noticeably improved. 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 perfect filter for viewing nebula from light polluted skies, or for boosting the contrast of nebula from dark sky sites.
In addition to it's optimum spectral and optical characteristics, the UHC/LPR filter offers important features that set it apart and result in the highest quality celestial views:
Reviewed by 3 customers
Our polluted and not so good sky turns black when viewed through this filter. Excellent for deep sky imaging as well.
The Celestron UHC filter works as advertised by blocking out the pinkish light from modern sodium vapor streetlights. However, it is not a substitute for truly dark country skies.
Works great at filtering out light polution. Got it on sale & has been a great addition to my telescope kit.