Baader H-beta Narrowband-Filter (5.5nm) – CMOS-optimized

• Baader H-Beta Narrowband Filter – Precision Grade
• 5.5 nm FWHM, recommended for optical systems from f/10 to f/3.5
• 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

The new generation of Baader CMOS-optimized filters features:

• CMOS-Optimized Baader Filter
• Increased contrast
• Ever more narrow passbands
• Reflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics
• 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