Baader 6.5nm Narrowband-Filterset 1¼" – CMOS-optimized (H-alpha / O-III / S-II)

Highlights

• 1¼" x 2 mm Baader CMOS H-alpha / O-III / S-II Narrowband Filter Set – Precision Grade – with 1¼" (28,5 mm) filter thread
• 6.5 nm FWHM, recommended for optical systems from > f/3.4
• Reflex-Blocker™ hard coated and plane-optically 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

Description 

This new generation of Baader CMOS-filters features:

• Increased contrast
• Ever more narrow band-passes
• 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 remaining Par focal
• Blackened edges all around, with filter-lead-side-indicator in the form of a black front side 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

 

Specifications

Manufacturer	Baader Planetarium
SKU (#)	2961650
EAN Code	4047825103895
Net weight (kg)	0.18
Suitable for f/ratio	> f/3.4
Transmission Range	H-alpha / O-III / S-II
Filter Thickness (without cell)	2 mm
HBW (Half bandwidth)	6.5 nm
CWL (Central Wavelength)	656,3 nm / 500,7 nm / 671,7 nm
AR-Coating	Reflex-Blocker™ hard coated, plane-optically polished
Special Features	CMOS-optimized with Life-Coat™
Filter size	1 25 inch
Filter Usage	CMOS, CCD, H-alpha, O-III, S-II
Filter mounted	Mounted (LPFC 6mm)
Type of Filter	Narrowband
Single or Set?	Filter-Set
Filter shape	round