Baader 6.5nm Narrowband-Filterset 31mm – CMOS-optimized (H-alpha / O-III / S-II)

Baader PlanetariumSKU: 2961651

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Description

Highlights

  • 31 mm x 2 mm Baader CMOS H-alpha / O-III / S-II Narrowband Filter Set – Precision Grade
  • 6.5 nm FWHM, recommended for optical systems from > f/3.4
  • 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

Description

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
  •  

    Specifications 

    Manufacturer Baader Planetarium
    SKU (#) 2961651
    EAN Code 4047825103901
    Net weight (kg) 0.18
    Suitable for f/ratio > f/3.4
    Transmission Range H-alpha / O-III / S-II
    Filter Thickness (without cell) 2 mm
    HBW (Halfbandwidth) 6.5 nm
    CWL (Central Wavelength) 656,3 nm / 500,7 nm / 671,7 nm
    AR-Coating Reflex-Blocker™ hard coated, planeoptically polished
    Special Features CMOS-optimized with Life-Coat™
    Filter size 31 mm
    Filter Usage CMOS, CCD, H-alpha, O-III, S-II
    Filter mounted Unmounted
    Type of Filter Narrowband
    Single or Set? Filter-Set
    Filter shape round

    Additional Resources

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