Astronomik H-Alpha 12nm CCD Filter - 2" Round Mounted

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Astronomik H-Alpha 12nm CCD Filter - 2" Round Mounted
$289.95
Item # AK-HA12-2
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  • This Astronomik 12nm H-Alpha Filter is for CCD use and comes mounted in a 2" cell.
  • Great for planetary nebulae and supernova remnants, the The Astronomik 12nm H-Alpha CCD Filter has high transmission of nearly 100% in H-alpha.
  • The Astronomik H-Alpha CCD Filter is NOT suitable for solar observations!
Description

Details

Astronomik H-Alpha 12nm CCD Filter - 2" Mounted

The Astronomik H-alpha filter is a narrow band filter for CCD photography. The filter lets the H-alpha light of emission nebulae pass and blocks nearly the whole remainder of the spectrum where the CCD is sensitive.

The full width at half-maximum (FWHM) of 12nm is optimized for the use with common CCD cameras and allows the use of very fast optics. It should be noted that the filter has a transmission of up to 99%. Another advantage of the 12nm filters is the availability of guiding stars for cameras with a built-in-autoguider (SBIG). If you use a very strong filter like our 6nm filter you often won’t find a usable guidestar.

The range of application extends from 1:2.8 to 1:15. Transmission losses and chromatic distortions, which arise with other filters, only occur with Astronomik filters when extremely bright aperture ratios of 1:2 and more come into play.

The Astronomik H-alpha-CCD (12nm version) increases the contrast between objects, in this case between the H-alpha emission line and the skyglow background. Our Astronomik H-alpha-CCD (12nm version) completely suppresses the emission lines of artificial lighting (mercury (Hg) and sodium (Na)) and skyglow. When using the OIII CCD and the SII-CCD filters you can obtain three-color images of emission line objects (gas nebulae) from locations with very strong light pollution. To do so, you would take an image in three different wavelengths, select each one as a color-channel in Photoshop and paste them together as a color image. The Astronomik H-Alpha filter may NOT be used for solar observation. f you plan to create color images from emission line data, our CLS-CCD filter is a great choice for the Luminance channel.

Astronomik H-Alpha 12nm CCD Filter - 2" Mounted Features

  • Transmission of over 97% with the H-alpha line (656nm)
  • Complete blocking from all disturbing wavelengths in the infrared
  • Parfocal with other Astronomik filters
  • Glass thickness: 1mm
  • Completely resistant against high humidity, scratches and aging effects
  • Diffraction limited, the filter will not reduce the optical performance of your telescope!
  • Astronomik filters are delivered in a high-quality, long lasting, filter box
Astronomik Product Number: HA12-2
Additional Information

Additional Information

SKU AK-HA12-2
Manufacturer Astronomik
Type of Filter H-Alpha
Filter Usage Imaging
Single or Set? Single Filter
Filter Size 2"
Filter Shape Round
Filter Mounted? Mounted
Warranty 10 Year Warranty
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Included Items

Included Items

  • Astronomik 12nm H-Alpha CCD Filter - 2" Mounted
  • Plastic Storage Case
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