Baader UV/IR-Cut / L-Filter 2" unmounted (Ø 47,4 mm) for FCCT – CMOS-optimized

• 47.4 mm (2" w/o cell) x 2 mm Baader CMOS UV/IR-Cut (420 – 685 nm) Bandpass Filter, suitable from f/15 to f/1.8
• 2" Filter removed from filter cell, specially selected for use with 2" Filter sliders of the Baader FCCT (Filter Changer Camera Tilter) for RASA 8 and QHY cameras
• Reflects harmful thermal radiation in the infrared spectral range
• Provides 98% transmission over the entire visible spectrum from 420 - 685 nm
• Prevents blurred star imaging with red-sensitive digital and CCD/CMOS cameras
• 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

This new generation of Baader CMOS-filters features:

• Increased contrast, matched for typical CMOS quantum efficiency and s/n ratio
• 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 telescope-sided black 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