O-III Filters
The O-III line at 501nm is an important emission line of many Nebula objects and SN remnants. An extreme background contrast can be achieved even in urban areas with narrow-band filters.
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The Altair Astro Premium Oiii 6.5nm filter is designed for astro imaging of nebulae with Mono CCD or CMOS cameras, blocking light pollution by cutting out the light pollution wavelengths. The filter blocks UV IR and has an anti-reflection AR coating.
Antlia 1.25" 3 nm O-III ultra - narrow band filter for astrophotography - images with extreme contrast even with strong light pollution
1.25" mounted with low-profile filter cell Suitable for telescopes and lenses with a focal ratio of f/3 and lower Schott optical base substrate Blackened edges to avoid internal reflections Extremely narrow bandwidth of only 3 nm for maximum contrast Central wavelength 500,7 nm Filter thickness 2 mm Comes in convenient plastic transport box Antlia 2" 3 nm O-III ultra - narrow band filter for astrophotography - images with extreme contrast even with strong light pollution
2" mounted with low-profile filter cell Suitable for telescopes and lenses with a focal ratio of f/3 and lower Schott optical base substrate Blackened edges to avoid internal reflections Extremely narrow bandwidth of only 3 nm for maximum contrast Central wavelength 500,7 nm Filter thickness 2 mm Comes in convenient plastic transport box The Astronomik 12 nm OIII CCD filter 1.25" is an extremely narrow emission-line filter for CCD photography
The Astronomik 12 nm OIII CCD filter 2" is an extremely narrow emission-line filter for CCD photography
The Astronomik 12 nm OIII CCD filter Clip EOS APS-C is an extremely narrow emission-line filter for CCD photography
The Astronomik 12 nm OIII CCD filter Clip Filter EOS XL is an extremely narrow emission-line filter for CCD photography
The Astronomik 6 nm OIII CCD filter 1.25" is an extremely narrow emission-line filter for CCD photography
The Astronomik 6 nm OIII CCD filter 2" is an extremely narrow emission-line filter for CCD photography
The Astronomik 6 nm OIII CCD filter Clip EOS APS-C is an extremely narrow emission-line filter for CCD photography
The Astronomik 6 nm OIII CCD filter Clip Filter EOS XL is an extremely narrow emission-line filter for CCD photography
Astronomik OIII-CCD Filter with 12 nm FWHM in 1,25".