Now with 47.4 mm unmounted for use with FCCT

• Baader H-alpha / O-III / S-II f / 2 Highspeed Filter Set- Precision Grade
• 6.5 nm FWHM, recommended for extremely fast optical systems from f / 3.4 to f / 1.8
• Specially designed for the special filter requirements when used with fast optics like the Celestron RASA astrographs
• Reflex-Blocker TM hard coated and planoptically polished- with sealed coating edges ( Life-Coat TM )
• Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside outer rim
• Optimized for modern CMOS cameras, but 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-BlockerTM 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

Technical Specifications

In the Box

Baader 6.5nm f/2 Highspeed Filters- CMOS-optimized (H-alpha, O-III, S-11)

Warranty & Manual

Baader Lifetime Warranty
Problems with filters can have the strangest causes