Altair Astro

This filter was developed to suppress light pollution for colour and monochrome cameras and offers more balanced RGB colours.

• ltair TRI-RGB is great for broadband objects such as mixed emission / reflection nebulae, comets, dust clouds and galaxies, but it also allows the major emission nebulae lines through. It covers both broadband AND narrowband targets.
• TRI-RGB complements the Altair TriBand and DualBand filters by adding star colours.
• TRI-RGB and works with fast or slow focal ratio telescopes and camera lenses. 
• TRI-RGB is not only for light pollution control. It works very well under dark skies too by enhancing colour purity, airglow and reducing channel crossover in colour CMOS and DSLR cameras.
• Although primarily intended for colour cameras, TRI-RGB can be used for a cleaner luminance channel with a mono camera. 
• High transmission peaks with steep sides enhance contrast, together with almost total suppression of unwanted light, at OD4/5 (0.01%~0.001%) over the majority of unwanted visual wavelengths.

Narrowband H-Alpha, O-III and SII nebula filters from Altair for astrophotography with CMOS sensors for high contrast for telescopes with ~f/4.5

• optimized for CMOS sensors (Color and MONO)
• exact and narrow half-widths for optimal signal-to-noise ratio
• Identical filter thicknesses for homofocality
• Blackened edges
• The edge of the filter is sealed to prevent moisture penetration
• SiO2 coating for virtually unlimited lifetime
• Low-profile filter mount - height only 6 mm
• Certificate