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Baader Planetarium 50x50mm f/2 High-speed Imaging H-alpha/OIII/SII Filter Set
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Baader Planetarium 50x50mm Square f/2 High-speed Narrowband Imaging H-alpha/OIII/SII Filter Set, Unmounted

SKU: AAFHSSSQ50
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Baader Planetarium Filter Set Specifications

  • Transmission Range

    Multiple bands

  • Filter Thickness

    3mm (without Cell)

  • Central Wavelength

    656.3nm, 502nm, 673nm

  • AR-coating

    Dielectrically coated, plane optically polished

  • Special Functions

    Maximum contrast for fast Astrographs

  • Filter Size

    50 x 50mm (1.97 x 1.97")

  • Filter Usage

    CCD, Deep Sky, f/2 High-speed, H-alpha, O-III, S-II

  • Filter Mounted

    Unmounted

  • Type of Filter

    Narrowband

  • Filter Shape

    Square

  • Weight

    0.197kg (0.43 lbs)

About Baader Planetarium Filter Set

• f/2 Highspeed filterset consisting of 3 filters: H-alpha, O III and S II. Highspeed Narrowband Filters 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
• 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 use fast optics really effectively for high contrast emission nebulae imaging. Triple S/N-ratio when compared to common narrowband filters at f/2
• using these filters between f/1.8 and f/3.5 shows a dramatic improvement compared to any regular set of narrowband-filters

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What's in the box:

  • Baader Planetarium H-alpha Filter
  • Oxygen-III Nebula Filter
  • Sulfur-II Filter
  • Stackable Filter Box
  • Baader Planetarium 2 Year Limited Warranty