Description:
Baader H-alpha Ultra-Narrowband Filter – Premium Grade. 3.5nm 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 planeoptically 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. Optimised for modern CMOS cameras, but likewise excellent for CCD camera technologies.
Features: Baader H-alpha 50x50mm Optimiz Ultra-Narrowband Filter 3.5nm CMOS
- 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)
- Life-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment
Specifications: Baader H-alpha 50x50mm Optimiz Ultra-Narrowband Filter 3.5nm CMOS
- NET WEIGHT (KG) 0.06-0.09
- COLOUR Black
- TRANSMISSION RANGE H-alpha
- FILTER THICKNESS (WITHOUT CELL) 2 mm (3mm D50.4 – 65x65mm)
- 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 SIZE 1 25 inch – 65x65mm
- FILTER USAGE CMOS, CCD, H-alpha
- FILTER MOUNTED Mounted (LPFC 6mm)
- TYPE OF FILTER Ultra-Narrowband
- SINGLE OR SET? Single Filter
- FILTER SHAPE round/square
For more information about, Baader H-alpha 50x50mm Optimiz Ultra-Narrowband Filter 3.5nm CMOS website.
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