Astrophotographic 1.25" filter allows high-contrast imaging even in areas with strong light pollution
Filter passes light at 500.7nm wavelength (O-III line) with a bandpass of 7nm for pleasing results
Very high 90% transmission of O-III light for sharp astrophotos
Filter made from high-grade glass with dichroic interference and antireflection coatings; size 1.25". Metal filter cell construction.
Use with S-II and H-alpha extra-narrowband imaging filters for tricolor CCD astrophotography
Photograph Nebulas in a New Light, Even With a Full Moon Oxygen-III (O-III) Extra-Narrowband Imaging Filter The O-III filter passes light at the 500.7nm wavelength (the Oxygen-III line) with very high 90 percent transmission and a bandpass of 7nm. It complements the Orion H-alpha (5587) and Sulfur-II (5579) extra-narrowband filters, which together allow advanced tricolor imaging of emission nebulas with the StarShoot Deep Space Monochrome CCD Imaging Camera or other monochrome CCD cameras. So if you're ready to go beyond RGB imaging and capture your favorite nebulas in a revealing new light - no matter how light-polluted your skies -- add our O-III (and S-II and H-alpha) Extra-Narrowband filter to your imaging arsenal! Includes protective plastic case.