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Alpine Astronomical Baader H-beta Narrowband Filter (50.4mm Round, Unmounted)(Alpine Astronomical Baader H Beta Narrowband Filter 50 4mm Round Unmounted)

Alpine Astronomical Baader H-beta Narrowband Filter (50.4mm Round, Unmounted)(Alpine Astronomical Baader H Beta Narrowband Filter 50 4mm Round Unmounted)

Original price was: $331.00.Current price is: $99.99.

SKU: DGFUB 6899044450389 Categories: Optics, Optics & Surveillance, Telescopes Tags: Alpine Astronomical FCHBN-RD50, Astrophotography, Optics, Telescopes

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Alpine Astronomical FCHBN-RD50 Overview

This 50.4mm Round, Unmounted Baader H-beta Narrowband Filter, from Alpine Astronomical, is a 5.5nm FWHM filter recommended for optical systems from f/10 to f/3.5. It features a Reflex-Blocker hard coating, which has been planeoptically polished, and has Life-Coat sealed coating edges. It is equally suitable for modern CMOS sensors as well as for older CCD camera technologies.

Reflex-Blocker coatings offer largest ever freedom from halos, even under most adverse conditions concerning aux-optics
Identical filter thickness to existing standards (2mm), 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)
Life-Coat: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment

Alpine Astronomical FCHBN-RD50 Specs

Alpine Astronomical FCHBN-RD50 Reviews

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