Baader CMOS Optimised 5.5nm H-Beta Narrowband Filters

This new generation of Baader Planetarium filters are ideal for imaging with CMOS as well as CCD cameras. The CMOS optimised H-Beta narrowband filter has the following specifications:

• Baader H-Beta Narrowband Filter – Precision Grade
• 5.5 nm FWHM, recommended for optical systems from f/10 to f/3.5
• 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
• 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

The filters are available in 1.25″ and 2″ mounted (with Baader 6mm Low Profile Filter Cell [LPFC]) as well as unmounted 31mm, 36mm, 50.4mm, 50x50mm and 65x65mm sizes.

A note about Life-Coat™: Limited-Lifetime-Warranty for CMOS-optimized Baader filters: A Baader Planetarium exclusive: Filters incorporating Baader Planetarium’s Life-Coat™ technology are so durable that Baader Planetarium warrants the coatings for the life of the filter. Baader Planetarium has developed Life-Coat™ using materials and processes that result in coatings which will not degrade or fail for a lifetime. Life-Coat™ coatings resist moisture, temperature extremes, and are hardened to withstand normal cleanings. Baader Planetarium guarantees their Life-Coat™ coatings will not peel, flake or physically degrade and will withstand repeated cleaning with fine optical cleaning equipment. The Limited Lifetime Warranty applies to the original purchaser and does not cover failure from mis-use, physical damage through improper handling, or improper cleaning. To make a warranty claim, simply contact us with proof of purchase and a detailed failure description. We will then advise of the next steps.