STC Astro Duo-Narrowband Clip Filter enables astrophotographers to capture two narrowband emission lines simultaneously, rendering ultra high contrast nebula images even if under the influence of strong light pollution in city. This ultimate dual narrowband filter enables one-shot-colour cooled camera and DSLR users to capture narrowband signals efficiently.
Features： ●Passes two major narrowband 10nm transmission lines — Ha (656.3nm) & O-III (500.7nm) at high transmission rate (~80% or above)
●Suitable for DSLR and One-Shot-Colour Camera
●Superb contrast for nebulosity
●Available in 48mm standard size and Clip Mount version (see bottom of page)