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Astronomy > Filters > Nebulae filters > H-Alpha Filters > Astronomik > H-alpha 12nm > Astronomik Filters H-Alpha 12nm 27mm CCD filter, unmounted
Product no.: 55061

Filters H-Alpha 12nm 27mm CCD filter, unmounted

$ 141.00 incl. VAT, plus shipping costs
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Product description

A bit of help with your selection:

  • As a first filter, we recommend the Astronomik CLS filter. This filter suppresses artificial light pollution and natural airglow. By using this filter you get a dark-sky background and can therefore use much longer exposure times to make fainter objects visible. The filter is optimised in such a way that objects are reproduced in their natural colours. Important: the simple CLS filter has no built-in IR-blocking. Therefore you will need the CLS-CCD filter for an astro-modified camera!
  • A good choice for working in locations with really heavy light pollution is the Astronomik UHC filter. The transmission curve of this filter only allows the light of the H-beta, OIII, H-alpha and SII lines to pass through. The background suppression is significantly stronger than with the CLS, however this filter works only for gas nebulae! Star clusters and galaxies are largely filtered out.
  • For a more in-depth introduction to astrophotography, we recommend the OIII, H-alpha and SII emission lines filters, available with full width at half maximum of 6nm or 12nm. With these filters you can create detailed images of faint objects even from locations with extreme light pollution and a full Moon high above in the sky. Images in these narrow emission lines are not naturally coloured.
  • For the owners of astro-modified cameras we offer the Astronomik OWB filter: OWB stands for "original white balance". The filter corrects the displaced colour reproduction of a converted camera so that it can also be used for normal every-day photography, without having to revise every image on the computer.

Specifications

Capacity


Half-value width (nm)
12
Frame
unmounted
Transmission
96
Filter Size (mm)
27

Special features


Homofocal
yes

General


Series
H-alpha 12nm
Type
Filters
Type of build
line filter

Area of application


Useful for photographs
yes
Anti light-pollution
yes
Visually useful
no
Astronomik Filters H-Alpha 12nm 27mm CCD filter, unmounted
Light transmission curve

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