Astromania Telescope Filter, 1.25 inch Multi-Narrowband Galaxy Nebula H-Beta Filter for Astronomy Telescope, Metal Frame Telescope Accessories Light Pollution Filter

Filter with metal mount 1.25" filter threads on both sides. Executes with a transmission of over 90% and completely rejects light pollution. The high optical quality of the Astromania filters guarantees no loss in sharpness or contrast. Have extremely high transmissions, while completely rejecting light pollution as well as the important blocking of longer wavelengths. Substrate is fine-optically polished plane parallel to deliver a smooth and accurate 1/4 wavefront over the entire surface.