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Filters > Nebulae filters > OIII Filters > Baader > f/2 Highspeed > Baader Filters OIII Highspeed f/2 31mm
Product no.: 64058

Filters OIII Highspeed f/2 31mm

$ 176.00 Sale price:
$ 95.98 incl. VAT, plus shipping costs
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Product description

More about the series f/2 Highspeed...

New f/2 Highspeed Narrowband Filters- und Filtersets (1 ¼" und 2", H-alpha / O III / S II) are designed especially for the delicate requirements of extremely fast astrograph optics, in particular Hyperstar and RASA. Conventional narrowband filters cause a heavy loss in transmission due to the strong CWL-shift. In extreme cases the CWL even does shift out of the FWHM (CWL= Center-wavelength / FWHM= full width half maximum).

Therefore these filters have a CWL-preshift which matches f/2 to f/3 perfectly. Also the FWHM is optimized. In spite of the typical line broadening with such fast optical trains they are able to deliver maximum contrast. For the first time these filters allow to use fast optics really effectively with high contrast emission nebulae imaging. Using these filters between f/1,8 and f/3,5 shows a dramatic improvement compared to any regular set of narrowband-filters.



Filter Size (mm)
filter thickness (mm)
Central wavelength (nm)
Coating of optical system


Type of build
line filter
f/2 Highspeed
Weight (g)
Baader Filters OIII Highspeed f/2 31mm
Baader Filters OIII Highspeed f/2 31mm

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