The STC Astro Duo Narrowband Filter 2″ targets Ha and OIII emission lines to deliver very high contrast colour images for one shot colour and DSLR cameras.
- STC Astro Duo Narrowband filter 2″ reduces interference from artificial lighting and enhances the Ha and OIII emission lines, less of the weak Hb line is transmitted for Ultra High Contrast!
- IBAD (Ion beam-assisted deposition) coating technology gives the glass have higher durability for safer cleaning, and prevents ageing changes in spectral characteristics over time.
- Matte black anodised and Teflon-coated cell eliminates flare and makes it easy to install or remove from your lens.
- Also available in 1.25″ size and as a clip filter for many cameras – please ask