Optolong Hydrogen-Beta 12nm Narrowband Filter

OptolongSKU: Optolong H-Beta 1.25"

Size: 1.25"
Sale price$115 CAD
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The Optolong H-beta filter is designed for nebula observation, with a 12nm bandwidth centered on a wavelength of 486nm (the frequency of Hydrogen-Beta emissions).

The filter is best suited to a large aperture telescope under clear and dark viewing conditions with good seeing.

Suitable for viewing nebulae such as the Horsehead Nebula and California Nebula.


H-Beta Spectrum

How to read the chart?

▲The horizontal axis is the Wavelength in Nanometers (nm).

▲The vertical axis is transmission in %.

▲The WHITE line shows the transmission of the filter. Artificial light emission lines (light pollution) are shown in ORANGE and the emission lines from H-alpha, H-Beta and O-III in nebulae are shown in GREEN.



Additional Resources

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