Advanced Light Pollution Suppression
The STC Astro Multispectra filter is a high-performance suppression filter designed for astrophotography in urban or suburban environments. It passing more than 95% of key spectral lines such as Hydrogen-Alpha (656.3nm), Oxygen III (495.9 & 500.7nm), and Hydrogen-Beta (486.1nm).
By filtering out airglow and artificial city light, it allows for longer exposures, recording deeper details of nebulae and the Milky Way with natural star colors.
Key Features:
- IBAD technology prevents spectral variation due to temperature or humidity changes.
- Precision CNC machined metal parts with anodized aluminum to reduce reflections.
- Interference filter design ensures high clarity and definition across the field.
| Specification | Details |
|---|---|
| Available Size | 48mm Filter |
| Material | SCHOTT® B270 Optical Glass, Aluminum 6061 rim |
| Thickness | 2mm Glass, 3.5mm Rim |
| Waterproof Performance | Nano Coating (Contact angle > 110°) | Taiwan |
| Compliance | RoHS 2.0 |
| Brand | William Optics |