Astronomik Filters H-beta 2"

Light pollution from artificial sources like streetlights poses a significant challenge to observing the night sky, particularly in urban areas, where the sky lacks true darkness, greatly hindering the visibility of celestial objects beyond the Solar System.

To counteract this issue, the H-beta filter proves invaluable. It capitalizes on a unique feature of emission nebulae, which emit light in specific colors known as emission lines, typically associated with certain chemical elements like hydrogen. By selectively blocking out all colors except for the emission line of hydrogen, the H-beta filter effectively filters out artificial light, enhancing contrast and making nebulae visible even in light-polluted skies. For instance, with just a 300mm telescope, the Horsehead Nebula is nearly invisible in suburban skies, but with this filter, its structures become discernible, offering a remarkable viewing experience for visual observers.

SPECIFICATIONS:

Capacity: Filters

Coating of Optical System: Multiple

Mount Material: Aluminium

Frame: 2"

Half-Value Width (nm): 12

Transmission: 97

Filter Thickness (mm): 1

General: H-beta CCD Series

Type: Filters

Type of Build: Line Filter

Area of Application: Useful for Photographs

Visually Useful: Yes

Anti Light-Pollution: Yes

Hydrogen Nebulae: Yes

Supernova Remains: Yes