Filters on Sale

The right filter transforms your astrophotography and visual observing. Ontario Telescope carries a comprehensive selection of
narrowband filters (H-alpha, OIII, SII), broadband light pollution filters, LRGB imaging filter sets, UV/IR cut filters, solar filters, and
lunar/planetary color filters from top brands including Optolong, Antlia, Baader Planetarium, and Chroma.
Filters are available in standard 1.25-inch, 2-inch, and drop-in formats to fit any imaging train. Our team can help you choose between
dual-band, tri-band, and single-band filter strategies based on your camera type (OSC or mono) and light pollution conditions.