Celestron UHC/LPR Filter - 1.25`

The Celestron UHC/LPR Filter - 1.25 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). This new ultra high contrast (UHC) LPR filter has improved contrast over the typical broadband filters. S