IDAS LPS-P2 48mm (2 Inch) Light Pollution Filter MBT & IGAD (Pre-owned)
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The IDAS Light Pollution Suppression 48mm 2 Inch (LPS) Filter - P2 is an astronomical broadband filter designed to suppress artificial light while maintaining balanced color transmission
Key Features & Technology
• Multi-Bandpass Technology (MBT): Blocks common artificial emission lines (such as mercury and sodium-vapor lamps) while letting key nebula emission lines pass. It preserves natural color balance for broadband targets like stars, galaxies, and globular clusters.
• Ion Gun Assisted Deposition (IGAD): Uses quartz-hard physical coatings that improve humidity and temperature stability, reducing spectrum shifts to ± 1nm.
• Signal-to-Noise Boost: Improves contrast and signal-to-noise ratio when imaging through light-polluted skies with DSLRs, color/mono CCDs, or CMOS cameras.
Limitations & Performance Notes
• Street Lighting Types: Performs well against older mercury and high-pressure sodium lighting, but is less effective against modern LED or fluorescent streetlights