Ultra-Narrowband Baader H-alpha 3.5nm 36mm Ultra-Narrowband Filters Optimized for CMOS
This new generation of Baader CMOS filters features:
- CMOS-optimized Baader filters
- Increased contrast
- Increasingly narrower pass bands
- Reflex-Blocker ™ coatings, for the greatest freedom from halos, even in the most adverse conditions related to auxiliary optics
- FWHM in each filter category carefully designed to allow 1: 1: 1: 1 exposures, combined for typical CMOS quantum efficiency and s/w ratio
- Filter thickness identical to existing standards, with extreme care for parafocality
- Blackened edges all around, with filter lead-side indicator in the form of a black outer edge on the front side, to additionally eliminate any reflections due to light falling on the edge of a filter
- Each filter individually coated, with sealed coating edge (NOT cut from a larger plate with exposed coatings)
- Life-Coat ™: increasingly harder coatings to allow for a coating that will not age for life, even in the harshest environment
Summary key features:
- 36 mm x 2 mm Baader H-alpha ultra narrow band filters - Precision grade
- 3.5 nm FWHM (to harmonize exposure time with O-III / S-II), recommended for extremely fast optical systems from f/10 to f/3.5
- For the highest contrast even with the strongest light pollution, minimizes star size, emphasizes the finest nebula details, indispensable under Bortle 9/8/7 / (6) skies
- Reflex-Blocker ™ hard-coated and planoptically polished, with sealed coating edges (Life-Coat ™)
- Blackened edges all around, with filter lead side indicator in the form of a black outer edge on the front side
- Optimized for modern CMOS cameras, but excellent for CCD camera technologies
MANUFACTURER Baader Planetarium
NET WEIGHT(KG) 0.06
COLOR Black
TRANSMISSION RANGEH-alpha
FILTER THICKNESS (WITHOUT CELL) 2 mm
HBW (HALF-BANDWIDTH) 3.5 nm
CWL (CENTER WAVELENGTH) 656.3 nm
AR-COATING Reflex-Blocker ™ hard-coated, planoptically polished
SPECIAL FEATURES CMOS optimized with Life-Coat ™
FILTER SIZE36 mm
FILTER USAGE CMOS, CCD, H-alpha
FILTER MOUNTED ON FILTER Unmounted
FILTER TYPEUltra-Narrowband
SINGLE OR JOINT? Single filter
FILTER SHAPE round
Ultra-Narrowband Baader H-alpha 3.5nm 36mm Ultra-Narrowband Filters optimized for CMOS
