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Astronomik OIII 12 nm CCD Filter - 27 mm Round - OIIICCD-27

SKU: ASF-OIIICCD-27

Product is backordered from the manufacturer. Once the order is placed our team will update you on the anticipated arrival date.

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Astronomik OIII 12 nm CCD Filter - 27 mm Round



  • This Astronomik OIII 12 nm CCD Filter comes in a round 27 mm format and is designed especially for astrophotography purposes
  • Nearly 100% OIII line transmission
  • 12 nm FWHM bandwidth
  • Optimally suited for viewing planetary nebulae and supernova remnants
  • Coatings offer exceptional protection against scratching, aging, and humidity
  • This filter is diffraction limited and thus will not compromise your telescope's optical performance level
  • Made in Germany, a country known for producing high quality optics!
  • Optimized for telescopes with an aperture of 6" or more




More About Astronomik OIII 12 nm CCD Filters



This Astronomik OIII CCD Filter, a narrowband emission-line filter for CCD astrophotography, features a full width at half maximum (FWHM) of 12 nm. This is optimal for use with typical CCD cameras, enabling the use of extremely fast optics. This filter permits the light of double ionized oxygen from emission nebulae pass through while blocking close to the entire rest of the spectrum in the areas where the CCD is sensitive. The aperture ratio range ideally suited for this filter is 1:3 to 1:15 with apertures above 6" (150 mm). It should also be acknowledged that Astronomik O-III CCD Filters have an up to 99% transmission, a figure that cannot be attained by stacking extra narrowband filters. An additional note on the dark current of typical CCD imagers: exposures with a CCD cooled to -15°C are constricted by the CCD's dark current, even in large metropolitan areas with a heavily illuminated background. This directly influenced the 12 nm FWHM choice. A further benefit of this 12 nm filter is the easier availability of guiding stars for cameras that have an integrated autoguider.



The contrast between OIII emission line objects and those in the background sky is greatly enhanced by this Astronomik OIII CCD Filter. It completely cuts off artificial light emissions from mercury (Hg), sodium (Na), and skyglow. Unlike with filters from other manufacturers, the Astronomik 12 nm OIII CCD Filter won't have any transmission loss or chromatic distortions unless extremely bright aperture ratios of 1:2 or more are involved. Because this filter incorporates an IR-blocker up to 1150 nm, an additional IR blocking filter is not necessary.



When employing the Astronomik OIII 12 nm CCD Filter in conjunction with an H-Alpha or SII CCD filter, even imaging in an environment with very heavy light pollution will not prevent you from obtaining three-color images of emission line gas nebulae. To accomplish this, you need to capture an image in three different wavelengths, choose each as a color-channel in Photoshop and paste them together as one individual color image. This filter is diffraction limited and will not lower the optical efficiency of your telescope! Astronomik filters arrive with a long-lasting plastic storage box of supreme quality.



Transmission Specifications




  • Above 99% transmission for each of the OIII lines
  • Obstructs undesired wavelengths in other areas of the visible spectrum
Description
Description

Astronomik OIII 12 nm CCD Filter - 27 mm Round

  • This Astronomik OIII 12 nm CCD Filter comes in a round 27 mm format and is designed especially for astrophotography purposes
  • Nearly 100% OIII line transmission
  • 12 nm FWHM bandwidth
  • Optimally suited for viewing planetary nebulae and supernova remnants
  • Coatings offer exceptional protection against scratching, aging, and humidity
  • This filter is diffraction limited and thus will not compromise your telescope's optical performance level
  • Made in Germany, a country known for producing high quality optics!
  • Optimized for telescopes with an aperture of 6" or more


More About Astronomik OIII 12 nm CCD Filters

This Astronomik OIII CCD Filter, a narrowband emission-line filter for CCD astrophotography, features a full width at half maximum (FWHM) of 12 nm. This is optimal for use with typical CCD cameras, enabling the use of extremely fast optics. This filter permits the light of double ionized oxygen from emission nebulae pass through while blocking close to the entire rest of the spectrum in the areas where the CCD is sensitive. The aperture ratio range ideally suited for this filter is 1:3 to 1:15 with apertures above 6" (150 mm). It should also be acknowledged that Astronomik O-III CCD Filters have an up to 99% transmission, a figure that cannot be attained by stacking extra narrowband filters. An additional note on the dark current of typical CCD imagers: exposures with a CCD cooled to -15°C are constricted by the CCD's dark current, even in large metropolitan areas with a heavily illuminated background. This directly influenced the 12 nm FWHM choice. A further benefit of this 12 nm filter is the easier availability of guiding stars for cameras that have an integrated autoguider.

The contrast between OIII emission line objects and those in the background sky is greatly enhanced by this Astronomik OIII CCD Filter. It completely cuts off artificial light emissions from mercury (Hg), sodium (Na), and skyglow. Unlike with filters from other manufacturers, the Astronomik 12 nm OIII CCD Filter won't have any transmission loss or chromatic distortions unless extremely bright aperture ratios of 1:2 or more are involved. Because this filter incorporates an IR-blocker up to 1150 nm, an additional IR blocking filter is not necessary.

When employing the Astronomik OIII 12 nm CCD Filter in conjunction with an H-Alpha or SII CCD filter, even imaging in an environment with very heavy light pollution will not prevent you from obtaining three-color images of emission line gas nebulae. To accomplish this, you need to capture an image in three different wavelengths, choose each as a color-channel in Photoshop and paste them together as one individual color image. This filter is diffraction limited and will not lower the optical efficiency of your telescope! Astronomik filters arrive with a long-lasting plastic storage box of supreme quality.

Transmission Specifications


  • Above 99% transmission for each of the OIII lines
  • Obstructs undesired wavelengths in other areas of the visible spectrum
Specifications
Specifications
Model Number OIIICCD-27
Single Filter, Set, or Accessory Single Filter
Filter Type OIII
Filter Bandpass 12 nm
Filter Size 27 mm
Filter Shape Round
Filter Optical Thickness 1 mm
Filter Insert Style Drop-In
Warranty Ten (10) Years
What's in the Box?
What's in the Box?
  • Astronomik OIII 12 nm CCD Filter - 27 mm Round
  • Plastic Storage Case
  • Astronomik 27 mm Round OIII CCD Filter - 12 nm
  • Astronomik OIII 12 nm CCD Filter Transmission
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