Product series:
The filters in the H-alpha 6nm series are suitable for photographing hydrogen nebulae. The contrast between objects that emit H-alpha light and the background sky is greatly enhanced.
The full width at half maximum of 6 nanometres is perfectly suitable for use with cameras with particularly low dark current.
6nm filters are the best choice if you are observing from a location with extreme light pollution or photographing faint objects in regions of the sky with many stars.
![Astronomik Filters H-alpha 6nm CCD Clip Canon EOS R XL](/Produktbilder/normal/67099_1/Astronomik-Filters-H-alpha-6nm-CCD-Clip-Canon-EOS-R-XL.jpg)
Astronomik
Filters H-alpha 6nm CCD Clip Canon EOS R XL
$ 570.00
![Astronomik Filters H-alpha 6nm CCD Clip Sony alpha 7](/Produktbilder/normal/67101_1/Astronomik-Filters-H-alpha-6nm-CCD-Clip-Sony-alpha-7.jpg)
Astronomik
Filters H-alpha 6nm CCD Clip Sony alpha 7
$ 560.00
Transmission curve
![Transmission curve](/CMS/images/text/glossary/Astronomik-Schmalbandfilter H-alpha-CCD.png)
What does CCD mean?
CCD filters also feature an integrated IR block. This is particularly important for photography, since although the camera sensors are sensitive to this long-wave spectral range, the upstream optical instruments (telescopes etc.) cause imaging errors in the infrared range.
Such optical errors do not play a role in purely visual observation, since the human eye anyway cannot perceive them. Of course, if you specifically want to shoot in the IR spectrum, you should not use a CCD filter.