STC Astro Duo-Narrowband Filter

STC Astro Duo-Narrowband filter can reduce the interference from artificial lighting in the city ,and enhance the wave length of Hα and OIII.

IBAD (Ion beam-assisted deposition) coating technology makes the glass higher durability and easily cleaning, and preventing aging variation in optical spectral characteristics due to temperature and humidity change.

Matte black anodized and Teflon-coated frame design eliminates flare and easy to install or remove from your lens.

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