Triband RGB Ultra II Filter - 2"

The Antlia Triband RGB Ultra II Filter is a multiband light pollution suppression filter designed for broadband imaging of deep-sky objects with both OSC and monochrome cameras. This filter uniquely combines transmission of H-alpha (656.3nm), O-III (495.9nm, 500.7nm), SII (671.6-673.1nm), and H-Beta (486.1nm) emission lines with broader RGB bandpass coverage, enabling capture of over 90% of deep-sky objects including galaxies, reflection nebulae, emission nebulae, and star clusters across all light pollution conditions (Bortle 1-8). With its broad bandpass optimized for fast optics down to f/2 focal ratio and refined coating providing excellent halo suppression, it offers practical versatility for astrophotographers seeking balanced color imaging from light-polluted sites while delivering improved signal-to-noise performance.