The Celestron LRGB Imaging Four Filter Set provides the filters for using the LRGB astroimaging technique. This technique entails using a monochrome CCD imager to capture individual images with each of the three color filters and a fourth, monochrome image, with the luminance filter to provide the brightness. The images are then digitally layered to create a bright full-color picture of the subject. Each filter also blocks up to 99% of IR wavelengths, which can cause images to appear slightly out of focus and have anti-reflective multicoatings to increase the transmission of the specific color of light.
While this set is made for the LRGB imaging technique, they can be used by themselves or stacked, for general astronomy to enhance the viewing of planets and deep space subjects. They fit most 1.25" eyepieces with filter threads from many manufacturers and with their 26mm (1.02") clear aperture, they won't encroach on the fields of view for most eyepieces. Since they are mounted in a standard 1.25" cell, these filters can be used with a wide variety of cameras, including the Celestron Skyris and The Imaging Source astronomy cameras.