Astronomik OWB-CCD Typ 3 Filter
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Astronomik OWB-CCD Typ 3 Filter

£118.00
  (3 Reviews)
✓ 2 year warranty
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About this product

Model:  ak_owb-typ-3_clip_canon_eos_aps-c
Part Number:  10201084

The Astronomik OWB filter restores the original white balance of astro-modified DSLR cameras to enable them to be used for daytime photography as well.

The OWB (Original White Balance) filter shifts the complete spectrum of a converted DSLR in such a manner that the camera will not be exclusively usable for astro-photography. Therefore the decision, which in former times had to be made, whether to 'victimise' a DSLR in order to exclusively use it for astronomical tasks or accept the lower sensitivity on the red end of the spectrum it is now a thing of the past and disencumber your purse, too.

FEATURES

  • Special spectrum in order to adapt modified DSLR cameras (removed or substituted inbuilt IR-filter) to achieve standard colour space in digital imaging.
  • Optically polished substrate, striae-free and free of residual stresses
  • Not sensitive to high humidity or ageing effects
  • Scratch-resistance!
  • Excellent quality substrate, diffraction limited - the optical performance of your telescope will not be reduced
  • Parfocal with other Astronomik filters
  • 1mm Glass Thickness
  • Supplied in a high-quality, long lasting, filter box

Main use

DSLR cameras which have been converted for astronomical use by removing the inbuilt IR-filter or by substituting it with a filter with greater range for H-alpha, have a white balance that made them unable for 'terrestrial' purpose. The spectral sensitivity of the DSLR will be changed by an OWB-Filter to the former range. In other words: The OWB pretend to be the conventional built-in filter!

Transmission Chart

  • The horizontal axis is the Wavelength in Nanometers (nm). 400nm is deep blue, at 520nm the human eye senses green and at 600nm red. At 656nm is the famous "H-Alpha" emission line of hydrogen.
  • The transmission in % is plotted on the vertical axis.
  • The blue line shows the transmission of the filter.
  • The most important emission lines from nebulas are shown in orange. The most important lines are from ionised Hydrogen (H-alpha and H-beta) and double ionised oxygen (OIII).

The major emission lines of artificial light pollution:
| Hg 435,8nm | Hg 546,1nm | Hg 577,0nm | Hg 578,1nm |
| Na 589,0nm | Na 589,6nm | Na 615,4nm | Na 616,1nm |

The major emission lines of nebulas:
H-β 486,1nm | OIII 495,9nm | OIII 500,7nm | H-α 656,3nm

Suitability

  • Visual observation (dark skies): Unsuitable
  • Visual observation (urban skies): Unsuitable
  • Film photography: Unsuitable
  • CCD photography: Unsuitable
  • DSLR photography (original): Unsuitable
  • DSLR photography (astro modified): Very good, achieves a standard white balance for 'terrestrial' photography
  • DSLR photography (MC modified): Very good, achieves a standard white balance for 'terrestrial' photography
  • Webcam / Video (Planets): Unsuitable
  • Webcam / Video (Deep Sky): Unsuitable

Technical Data

  • Special spectrum in order to adapt modified DSLR cameras (removed or substituted inbuilt IR-filter) to achieve standard colour space in digital imaging.
  • Parfocal with all Astronomik filters
  • Thickness of 1mm
  • Not sensitive to moisture, scratch resistant or ageing
  • Optically polished substrate, striae-free and free of residual stresses
  • Astronomik filters are delivered in a high-quality, long lasting, filter box

 

Customer reviews

Average Rating (3 Reviews):  
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Rating (max 5):  
Use your astro modified DSLR anytime!
25 December 2022  | 

Been using this about a year now, swapping it out as appropriate, fairly regularly. When I got my camera it was specifically for Astro imaging. The more I used it the more I wanted to try it out on holiday or on day trips out. This filter is great and allows you to use your one camera for everything. Much better than owning two such cameras. Clip in is by friction and spring arms on the filter - found this to be secure and reliable. This is pretty expensive but gives you great utility. Recommended.

Rating (max 5):  
Astronomik OWB-CCD Typ 3 Filter
28 March 2021  | 

I am really pleased with this filter . It does give the correct colour balance during the daytime for my modified DSLR . It is so easy then to swap this filter with the Astronomik CLS CCD filter for astronomical. use .

Rating (max 5):  
Natural colour balance from an astro-modified Canon
30 January 2020  | 

I had been using a Neodymium filter to revert my modified Canon M10 to daylight use. Substituting an OWB filter produces pictures with a much more natural colour balance - easily as good as the original . The clip-in mount is more positive than the clip-in MC filter I use for multispectral work. Expensive, but worth it.

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