Baader Highspeed 6.5nm 50.4 mm CMOS optimized filter set (H-alpha / O-III / S-II)
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:
- Baader H-alpha / O-III / S-II 50.4 mm x 3 mm high-speed filter set - Precision grade
- FWHM of 6.5 nm, recommended for optical systems from f/3.4 to f/1.8
- Specially designed for special filter requirements when used with fast optics like astrographs Celestron RASA
- 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) 0.21
COLOR Black
TRANSMISSION RANGEH-alpha / O-III / S-II
FILTER THICKNESS (WITHOUT CELL) 3 mm
HBW (HALF-BANDWIDTH) 6.5 nm
CWL (CENTER WAVE LENGTH) 656.3 nm / 500.7 nm / 671.7 nm
AR-COATING Reflex-Blocker ™ with hard coating, planoptically polished
SPECIAL FEATURES CMOS optimized with Life-Coat ™
FILTER SIZE50.4 mm
FILTER USAGE CMOS, CCD, H-alpha, O-III, S-II
FILTER MOUNTED UNASSEMBLED
FILTER TYPEf / 2 Highspeed
SINGLE OR ASSEMBLY? FILTERSET
FILTER SHAPE round
Baader Highspeed 6.5nm 50.4 mm filter set optimized for CMOS (H-alpha / O-III / S-II)
