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Home > Filters > Nebulae filters > H-Beta Filters > Astronomik > H-beta 12nm > Astronomik 1.25'' H-beta filter

Astronomik 1.25'' H-beta filter

Product no.: 24077
Manufacturer: Astronomik

$ 110.00

incl. VAT
Astronomik 1.25'' H-beta filter
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Product description:

Astronomik H-beta-CCD 12nm Filter

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

We have re-desgined all of our photographic filters. Since the end of 2008 we are shipping our new "Halo-Free" filters. read more...

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 better availability of guiding stars for cameras with a built-in-autoguider (SBIG). If you use a very strong filter like our H-alpha 6nm filter you often won’t find a usable guidestar.

Together with the other three Astronomik emission-line filters you can do great color images even from very light polluted places!

The filter has a built-in IR-blocker up to 1150nm. You don’t need an additional IR-blocker with this filter.

Main use

The Astronomik H-beta-CCD increases the contrast between objects, in this case between the H-beta emission line and the skyglow background. Our Astronomik H-beta-CCD completely suppresses the emission lines of artificial lighting (mercury (Hg) and sodium (Na)) and skyglow. The optimal aperture ratio for this filter is 1:3.5 to 1:6. 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.

Light transmission curve

18.11.2019
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