Set of 3 BAADER Ultra-HighSpeed 3.5 / 4NM F/3 filters in 50.4mm optimized for CMOS (H-Alpha/ O-III / S-II)
This new generation of Baader CMOS filters is characterized by
- CMOS-optimized Baader filters
- Increased contrast
- Increasingly narrower pass bands
- Reflex-Blocker™ coatings, for increased freedom from halos, even under the most adverse conditions related to auxiliary optics
- FWHM in each filter category carefully designed to allow 1:1:1 exposures, matched to typical CMOS quantum efficiency and s/w ratio
- Filter thickness identical to existing standards, with the utmost care for parfocality
- Blackened edges all around, with a filter 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 the coating edge sealed (NOT cut out of a larger plate with coatings left uncovered, read more)
- Life-Coat™: increasingly tougher coatings to enable a coating that will not age for life, even in the harshest environment
General features:
- 50.4mm x 2 mm Baader CMOS H-alpha / O-III / S-II f/3 High Speed Filter Set - Premium Grade
- 3.5 / 4 nm FWHM (to harmonize the exposure time of H-alpha with O-III / S-II), recommended for fast optical systems from f/3.4 to f/2.3
- Specially designed for the special requirements of filters when used with fast f/3 optics
- For maximum contrast even with the highest light pollution, minimizes the size of stars, emphasizes the finest details of nebulae - indispensable under Bortle 9/8/7/(6) skies
- Reflex-Blocker™ hard-coated and planoptic polished - with sealed coating edges (Life-Coat™)
- Blackened edges all around, with filter-side indicator in the form of a black outer edge on the telescope side
- Optimized for modern CMOS cameras, but equally excellent for CCD camera technologies
Technical specifications:
- MANUFACTURER Baader Planetarium
- NET WEIGHT (KG) 0.21
- SUITABLE FOR RATIO F/3.4 to f/2.3
- TRANSMISSION RANGE H-alpha / O-III / S-II
- FILTER THICKNESS (WITHOUT FILTER CELL) 3 mm
- HBW (HALFBANDWIDTH) 3.5 nm (H-alpha) / 4 nm (O-III / S-II)
- CWL (CENTRAL WAVE LENGTH) 656.3 nm / 500.7 nm / 671.7 nm
- AR COATING Reflex-Blocker™ hard-coated, flat-optically polished AR COATING
- SPECIAL FEATURES CMOS-optimized with Life-Coat™
- FILTER SIZE 50.4mm
- CMOS, CCD, H-alpha, O-III, S-II FILTER APPLICATION
- FILTER MOUNTING unmounted
- FILTER TYPE f/3 Ultra-Highspeed
- oNE OR SET? Filter-Set
- FILTER SHAPE round
Set of 3 BAADER Ultra-HighSpeed 3.5 / 4NM F/3 filters in 50.4mm optimized for CMOS (H-Alpha/ O-III / S-II)
