Celestron Oxygen III Narrowband Filter - 2 Inch

Observe rings, clusters, and nebulas in high clarity by using the Celestron Oxygen III Narrowband Filter with your telescope. By filtering and isolating ionised oxygen lines emitted by planets and nebulas, this filter offers clear and contrasting visuals. It further blocks the visual spectrum from 400 to 700 mm by utilising its vacuum deposited coating, eliminating halos that form behind stars.