Askar ColourMagic 2" Duo-Band C1 Filter - Ha + OIII - CM-DUO-C1
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DĂ©tails du produit
- Unité de gestion de stock ASK-CM-DUO-C1
Designed for deep-sky imaging of emission nebulae with a color camera, the Askar ColourMagic C1 Duo-Band Filter permits both H-alpha and Oxygen III wavelengths through while blocking those that contribute to light pollution.  The peak transmission is 90% at the center wavelength of 500.7nm and 656.6nm.  This combination will enhance contrast, darken the background sky, and produce better images of emission nebulae. Â
While this filter is similar to the D1 duo-narrowband filter, it is improved as far as peak transmission (90% vs 85%) and filter thickness (2mm vs 1.85mm).
ColourMagic C1 Duo-Band Filter Specifications
FWHM: Â OIII = 35nm+/-5nm, Ha = 15nm+/-3nm
CWL: Â 500.7nm & 656.6nm
Peak Transmittance: Â 90%
Filter Thickness: Â 2 +/- 0.05mm
Barrier Property: Â OD3 @ 200-1000nm
Surface Finish: Â 60/40