Set of Baader Ultra-Highspeed 3.5 and 4nm 2" filters optimized for CMOS (H-alpha / O-III / S-II)

Baader Ultra-Highspeed 3.5 and 4nm 2" CMOS optimized filters 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/n 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 further 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, read more)
• Life-Coat ™: increasingly hard coatings to enable a coating that will not age for life, even in the harshest environment

Summary general features:

• Baader H-alpha / O-III / O-III / S-II f / 2 ultrafast speed filter set 2" x 2 mm - Premium grade - with 2" (M48) filter thread
• 3.5 / 4 nm FWHM (to harmonize the exposure time of H-alpha with O-III / S-II), recommended for extremely fast f / 3.4 af / 1.8 optical systems
• Specially designed for special filter requirements when used with fast optics such as the Celestron RASA astrographs
• For the highest contrast even with the strongest light pollution, minimizes the size of the star, emphasizes the finest details of the nebula, 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
• Mounted on Baader low profile filter cell (LPFC) - 6 mm high

Technical Specifications:

• SKU (#) 2961683
• EAN CODE 4047825104137
• NET WEIGHT (KG) 0.20
• COLOR Black
• TRANSMISSION RANGE H-alpha / O-III / S-II
• FILTER THICKNESS (WITHOUT CELL) 2 mm
• HBW (HALF BANDWIDTH) 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, planoptically polished
• SPECIAL FEATURES CMOS optimized with Life-Coat™ CMOS
• FILTER SIZE 2 in
• CMOS, CCD, H-alpha, O-III, S-II FILTER APPLICATION
• FILTER MOUNTED Mounted (6 mm LPFC)
• FILTER TYPE f / 2 Ultra-Highspeed
• aLONE OR SET? Filter assembly
• FILTER SHAPE round

Baader Ultra-Highspeed 3.5 and 4nm 2" Ultra-Highspeed filter set optimized for CMOS (H-alpha / O-III / S-II)