Description
Highlights
- 2" x 2 mm Baader CMOS H-alpha f/2 Highspeed Filter – Precision Grade – with 2" (M48) filter thread
- 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
- Mounted in Baader Low Profile Filter Cell (LPFC) – 6 mm height
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