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.

The 40 mm f/3.3 Triplet ED guiding scope with carbon tube offers very good optics and fits all common finder shoes.

• Triplet ED objective with 40 mm aperture and 132 mm focal length
• T2 and 1.25" connection
• Adjustment range of the focus: 15 mm
• Focus point 10mm behind the T2 thread or 20mm behind the inner T2 thread if the T2 extension is removed
• Fine adjustment by twisting with precise fixation by counter ring
• Stable metal bracket with dovetail bar, suitable for finder shoes from TS-Optics, Skywatcher, GSO and many more.
• Carbon tube
• Multi-coating on triplet objective for maximum transmission
• Especially well suited for guiding cameras with small pixels and high resolution