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Baader H-alpha Ultra-Narrowband-Filters (6.5nm) – CMOS Optimized

2 In Stock - Ships Today if Ordered by 2pm EDT! (Mon - Fri)
Filter
2961100
$212 CAD
We will price-match in-stock Canadian astronomy dealer pricing

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HIghlights

  • Baader H-alpha Narrowband Filter – Precision Grade
  • 6.5 nm FWHM, recommended for optical systems from f/10 to f/3.5
  • Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
  • Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
  • Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

We explicitly warn against observing the sun with a DeepSky 6.5 nm (equivalent to 65 Ångstroem) H-alpha narrowband filter, specialized solar chromosphere and prominence filters from SolarSpectrum start at 0.8 Ångstroem. Photographic experiments with a camera are theoretically possible, but by no means observe the sun with naked eyes – you endanger your eyesight!

This new generation of Baader CMOS-filters features:

CMOS-optimized Baader Filters

 

  • Increased contrast
  • Ever more narrow passbands
  • Reflex-Blocker coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics
  • FWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s/n ratio
  • Identical filter thickness to existing standards, with utmost care for parfocality
  • Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter
  • Each filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more)
  • Life-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment

  •  

    These all new CMOS-optimized filters work magnificently with all existing digital camera technologies, be it CMOS or CCD. However – an owner of CCD-camera-technology will still find our previous, extremely affordable, narrowband filter technology to be fully apt for excellent imaging. But: "the Better always is enemy to the Good".


    BAADER BLOGPOST:
    NEW CMOS-OPTIMIZED BAADER FILTERS

    Additional Information

    Manufacturer Baader Planetarium
    SKU (#) Various
    EAN Code Various
    Net weight (kg) 0.09 approximately
    Colour Black
    Transmission Range H-alpha
    Filter Thickness (without cell) 3 mm
    HBW (Halfbandwidth) 6.5 nm
    CWL (Central Wavelength) 656,3 nm
    AR-Coating Reflex-Blocker™ hard coated, planeoptically polished
    Special Features CMOS-optimized with Life-Coat™
    Filter size Various
    Filter Usage CMOS, CCD, H-alpha
    Filter mounted Unmounted and Mounted
    Type of Filter Narrowband
    Single or Set? Single Filter
    Filter shape square and round

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