Sky-watcher H-Beta CCD Filter for Astro Telescopes 1.25" #20204
Brand New UK Stock, boxed with full Guarantee
This high performance CCD filter transmits only the Hydrogen Beta emission line, and therefore is useful for greatly increasing the contrast of objects that glow in the corresponding region of the spectrum, for example the Horsehead, Cocoon and California nebulae.
Recommended for capturing H-beta emitting objects using CCD photography under dark skies
