STC Filters Astro Duo Narrowband Filter 2"

The Astro Duo-Narrowband filter is meticulously crafted to capture the distinct wavelengths emitted by gaseous and planetary nebulae. It prioritizes the Hα emission line at 656nm and OIII lines at 500nm, boasting high transmission while effectively combating light pollution and blocking longer wavelengths. This results in enhanced detail and contrast in your astrophotography. Utilizing professional Ion Beam-assisted deposition and AR coating technology on Schott optical glass, this filter guarantees superior durability and impeccable image quality.

The STC Astro Duo-Narrowband filter excels in reducing the interference caused by artificial city lighting, thereby accentuating the wavelengths of Hα and OIII. Employing IBAD (Ion beam-assisted deposition) coating technology enhances the glass's durability, simplifies cleaning, and mitigates aging variations in optical spectral characteristics due to temperature and humidity fluctuations. Its matte black anodized and Teflon-coated frame design effectively eliminates flare and ensures easy installation and removal from your lens.

SPECIFICATIONS:

Capacity: Suitable for photographs.

Mount Material: Aluminum.

Connection (to Telescope): 2".

Frame: 2".

General:

Type: Filters.

Build Type: UHC Filters.

Area of Application:

Anti Light-Pollution: Yes.

Hydrogen Nebulae: Yes.

Planetary Nebulae: Yes.

Comets: No.

Central Stars: No.

Supernova Remnants: Yes.

Useful for Photographs: Yes.

Visually Useful: No.