UHC/LPR Filter - 1.25"Our 1 1 4" 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
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