William Optics STC Astro Multispectra M48 (MS) filter (SKU: YF-STC-M48)

William Optics STC Astro Multispectra M48 (MS) filter (William Optics, SKU: YF-STC-M48) is an astrophotography filter that attenuates selected bands of artificial lighting while preserving transmission of important emission lines. The M48 version is designed for compatible threaded filter holders.

Key features

• attenuation of selected sodium and mercury lamp emissions
• transmission of H-alpha, H-beta and OIII lines
• coatings applied using IBAD technology

Included items

• filter: STC Astro Multispectra M48

Technical specifications

• type: multispectral light-pollution suppression filter
• designation: Astro Multispectra, MS
• mounting thread: M48
• optical substrate: Schott B270 glass
• coating technology: IBAD, Ion Beam Assisted Deposition

The filter’s selective transmission helps increase contrast in night-sky images affected by artificial lighting.