Baader 3.5 / 4nm Ultra-Narrowband Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)

Filtres Bande 3.5-4 Baader 5.4mm

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Baader 3.5 / 4nm Ultra-Narrowband Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)

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Depending on availability from the supplier. Please contact us for more information

1'179.0 CHF tax incl.

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Baader 3.5 / 4nm Ultra-Narrowband Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)

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
MANUFACTURER Baader Planetarium
SKU (#) 2961674
EAN CODE 4047825104076
NET WEIGHT (KG) 0.21
COLOUR Black
TRANSMISSION RANGE H-alpha / O-III / S-II
FILTER THICKNESS (WITHOUT CELL) 3 mm
HBW (HALFBANDWIDTH) 3.5 nm (H-alpha) / 4 nm (O-III / S-II)
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 50.4 mm
FILTER USAGE CMOS, CCD, H-alpha, O-III, S-II
FILTER MOUNTED Unmounted
TYPE OF FILTER Ultra-Narrowband
SINGLE OR SET? Filter-Set
FILTER SHAPE round