[list] [*]Altair 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 [b]both broadband AND narrowband targets[/b]. [*]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. [/list]