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.
Celestron 1.25" Oxygen III Narrowband Filter Features: