This new generation of Baader CMOS-filters features:

• CMOS-optimized Baader Filters
• Increased contrast
• Ever more narrow passbands
• Reflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics
• FWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s/n ratio
• Identical filter thickness to existing standards, with utmost care for parfocality
• Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter
• Each filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more)
• Life-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment

Overs:

•     Baader S-II f/2 Highspeed Filter – Precision Grade
•     6.5 nm FWHM, recommended for extremely fast optical systems from f/3.4 and faster
•     Specially designed for the special filter requirements when used with extremely fast f/2 optics like the Celestron RASA astrographs
•     Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
•     Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
•     Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies