USED GEAR INFORMATION

This filter is in excellent condition. It does not appear to have any defects. They have been inspected, cleaned, and repackaged.

This new generation of Baader CMOS filters features:

CMOS-optimized Baader Filters

• Increased contrast
• Ever narrower passbands
• Reflex-Blocker ^™ coatings , for greatest 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)
• Life-Coat™ : evermore hard coatings to enable a non-aging coating for life – even in the most adverse environment

Baader O-III 36mm ultra-narrowband filter (4nm) – CMOS-optimized