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.
167.23 €
Delivery date : 3-4 days

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
347.06 €
Delivery date : 1-4 days

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
544.54 €
Delivery date : 1-4 days

Astrodon O3_27R Narrowband Filter for Astrophotography

  • 1,25" Narrowband Filter - mounted
  • Emission line: H-Alpha 3nm bandwidth
  • Thickness: 3mm - parfokal with all other Astrodon filters
  • Transmission: better than 90%
  • Best possible anti-reflection coating against halos around bright stars and ghost images
876.47 €
Delivery date : 4-8 weeks

Astrodon HA5_27R Narrowband Filter for Astrophotography

  • 1,25" Narrowband Filter - mounted
  • Emission line: H-Alpha 5nm bandwidth
  • Thickness: 3mm - parfokal with all other Astrodon filters
  • Transmission: better than 90%
  • Best possible anti-reflection coating against halos around bright stars and ghost images
568.91 €
Delivery date : 1-4 days
The Astronomik 12 nm OIII CCD  filter 1.25" is an extremely narrow emission-line filter for CCD photography
116.81 €
Delivery date : 1-2 days
The Astronomik 12 nm OIII CCD  filter 2" is an extremely narrow emission-line filter for CCD photography
251.26 €
Delivery date : 1-2 days
The Astronomik 12 nm OIII CCD  filter Clip EOS APS-C is an extremely narrow emission-line filter for CCD photography
167.23 €
Delivery date : 3-4 days
The Astronomik 12 nm OIII CCD  filter Clip Filter EOS XL is an extremely narrow emission-line filter for CCD photography
262.18 €
Delivery date : 3-4 days
The Astronomik 6 nm OIII CCD  filter 1.25" is an extremely narrow emission-line filter for CCD photography
167.23 €
Delivery date : 3-4 days
The Astronomik 6 nm OIII CCD  filter 2" is an extremely narrow emission-line filter for CCD photography
410.92 €
Delivery date : 3-4 days
The Astronomik 6 nm OIII CCD  filter Clip EOS APS-C is an extremely narrow emission-line filter for CCD photography
251.26 €
Delivery date : 3-4 days