Celestron 1.25" Oxygen III Narrowband Filter
Unleash the beauty of galactic planets and nebulae through the Celestron 1.25" Oxygen III Narrowband Filter.
This 1-1/4" Oxygen III narrowband filter helps to retain two doubly-ionized oxygen lines at (496 & 501nm lines) emitted by emission nebulae and planets while blocking other light spectrum. This will in turn produce a magnificient, high contrast view of nebulae (eg. Veil, Ring, Dumbbell, Crescent & onion nebulae) against a black sky background.
With its ultra-hard and vacuum deposited coatings, you would be surely impressed with the quality of astronomy view as compared to those less sophisticated coating technology.