Brand: Baader Planetarium

Baader Planetarium H-alpha f/3 Ultra-Highspeed-Filters (3.5nm) - CMOS-Optimized

Brand: Baader Planetarium

Baader Planetarium H-alpha f/3 Ultra-Highspeed-Filters (3.5nm) - CMOS-Optimized

  • Baader H-alpha f/3 Ultra-Highspeed Filter - Premium Grade
  • 3.5 nm FWHM (to harmonize the exposure time with O-III / S-II), recommended for fast optical systems from f/3.4 to f/2.3
  • Specially designed for the special filter requirements when used with fast f/3 optics
  • 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 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
Special Order
$417.95 CAD

Size Option

1.25 inch 2 inch 31 mm 36 mm 50.4 mm 50mm x 50mm 65mm x 65mm

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Special Order
$417.95 CAD

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Product Description

This new generation of Baader CMOS-filters features:

  • 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

Baader Planetarium H-alpha f/3 Ultra-Highspeed-Filter (3.5nm) - Graph

 

Size Options

SIZE OPTION 1.25 inch 2 inch 31 mm 36 mm 50.4 mm 50mm x 50mm 65mm x 65mm
SKU 2961350 2961353 2961351 2961352 2961354 2961355 2961356
EAN CODE 4047825047618 4047825047649 4047825047625 4047825047632 4047825047656 4047825047663 4047825047670
FILTER THICKNESS (WITHOUT CELL) 2 mm 2 mm 2 mm 2 mm 3 mm 3 mm 3 mm
FILTER MOUNTED Mounted Mounted Unmounted Unmounted Unmounted Unmounted Unmounted
FILTER SHAPE Round Round Round Round Round Square Square

Specifications

MANUFACTURER Baader Planetarium
SUITABLE FOR F/RATIO f/3.4 to f/2.3
TRANSMISSION RANGE H-alpha
FILTER THICKNESS (WITHOUT CELL) 2 mm
HBW (HALFBANDWIDTH) 3.5 nm
CWL (CENTRAL WAVELENGTH) 656.3 nm
AR-COATING Reflex-Blocker™ hard coated, planeoptically polished
SPECIAL FEATURES CMOS-Optimized with Life-Coat™
FILTER USAGE CMOS, CCD, H-alpha
TYPE OF FILTER f/3 Ultra-Highspeed
SINGLE OR SET? Single Filter

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