This Filter Blocks Common Spectral Lines from Lighting Sources!
Chroma LoGlow Light Pollution Filter Type AS - 2"
The Chroma LoGlow 2-Inch Light Pollution Filter - Blocks common spectral lines from lighting sources:
This filter provides balanced color for the visible spectrum while blocking most emission from metal-halide and vapor lamp sources which together contribute to sky glow.
It is housed in a 2" M48 Threaded Ring.
Typical spectral performance is ≥ 94-percent average across visible pass-bands; Blocking is ≥ OD1.4 at metal-halide and vapor lamp lines
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