Lunático Astronomía

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

719,001.045,00

Clear

Available from Jul / 2021

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

  • Baader H-alpha / O-III / S-II Ultra-Narrowband Filter Set – Premium Grade
  • 3.5/4 nm FWHM (to harmonize the exposure time from H-alpha with O-III / S-II), recommended for optical systems from f/10 to f/3.5
  • For highest contrast even at strongest light pollution:
          • minimizes star size,
          • emphasizes finest nebula detail
          • indispensable under Bortle 9/8/7/(6) skies
  • Reflex-Blocker™ hard coated and plane optically polished – with sealed coating edges (Life-Coat™)
  • Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim
  • Optimized for modern CMOS cameras, but excellent for CCD camera technologies

3 filters set:

  • H-alpha 3.5 nm Ultra-Narrowband
  • OIII 4 nm Ultra-Narrowband
  • SII 4 nm Ultra-Narrowband

Wavelength(nm):

Technical Data:

FILTER SIZE 1 25 inch 2 inch 36 mm
MANUFACTURER Baader Planetarium Baader Planetarium Baader Planetarium
SKU (#) 2961670 2961673 2961672
EAN CODE 4047825104038 4047825104069 4047825104052
WEIGHT (KG) 0.18 0.20 0.19
COLOUR Black Black Black
TRANSMISSION RANGE H-alpha / O-III / S-II H-alpha / O-III / S-II H-alpha / O-III / S-II
FILTER THICKNESS (WITHOUT CELL) 2 mm 2 mm 2 mm
HBW (HALFBANDWIDTH) 3.5 nm (H-alpha) / 4 nm (O-III / S-II) 3.5 nm (H-alpha) / 4 nm (O-III / S-II) 3.5 nm (H-alpha) / 4 nm (O-III / S-II)
CWL (CENTRAL WAVELENGTH) 656,3 nm / 500,7 nm / 671,7 nm 656,3 nm / 500,7 nm / 671,7 nm 656,3 nm / 500,7 nm / 671,7 nm
AR-COATING Reflex-Blocker™ hard coated, planeoptically polished Reflex-Blocker™ hard coated, planeoptically polished Reflex-Blocker™ hard coated, planeoptically polished
SPECIAL FEATURES CMOS-optimized with Life-Coat™ CMOS-optimized with Life-Coat™ CMOS-optimized with Life-Coat™
FILTER USAGE CMOS, CCD, H-alpha, O-III, S-II CMOS, CCD, H-alpha, O-III, S-II CMOS, CCD, H-alpha, O-III, S-II
FILTER MOUNTED Mounted (LPFC 6mm) Mounted (LPFC 6mm) Unmounted
TYPE OF FILTER Ultra-Narrowband Ultra-Narrowband Ultra-Narrowband
SINGLE OR SET? Filter-Set Filter-Set Filter-Set
FILTER SHAPE round round round

 


Available in other sizes and formats. If you do not find the size you want, contact us at info@lunatico.es.

Filter thread

1,25", 2", Ø 36

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