Baader H-alpha 6.5nm 1¼" CMOS optimized Narrowband Baader H-alpha Filters
This new generation of Baader CMOS filters features:
- CMOS-optimized Baader filters
- Increased contrast
- Increasingly narrower passbands
- 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:
- 1¼"x 2 mm Baader H-alpha narrow band filters - Precision grade - with 1¼" (28.5 mm) filter thread
- 6.5 nm FWHM, recommended for f/10 to f/3.5 optical systems
- 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
- Mounted on Baader low profile filter cell (LPFC) - 6 mm high
We explicitly caution against observing the sun with a 6.5 nm (65 Ångstroem equivalent) H-alpha DeepSky narrowband filter, specialized solar chromosphere and SolarSpectrum prominence filters start at 0.8 Ångstroem. Photographic experiments with a camera are theoretically possible, but by no means observe the sun with the naked eye, it endangers your eyesight!
MANUFACTURER Baader Planetarium
NET WEIGHT(KG) 0.06
COLOR Black
TRANSMISSION RANGEH-alpha
FILTER THICKNESS (WITHOUT CELL) 2 mm
HBW (HALF-BANDWIDTH) 6.5 nm
CWL (CENTER WAVELENGTH) 656.3 nm
AR-COATING Reflex-Blocker ™ hard-coated, planaroptically polished
SPECIAL FEATURES CMOS optimized with Life-Coat ™
FILTER SIZE1 25 inches
FILTER USAGE CMOS, CCD, H-alpha
FILTER MOUNTED ON FILTER Mounted (LPFC 6 mm)
FILTER TYPENarrowband
SINGLE OR CONJUNCTIVE? Single filter
FILTER SHAPE round
Narrowband Baader H-alpha 6.5nm 1¼" Narrowband Filters optimized for CMOS
