Celestron Narrowband Filter

Celestron Narrowband Filter

The 2" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects. Transparent glass or gelatin elements protect and alter the components of light passing through the lens while adding special effects as well as colors to an image This filter when attached to the lens, provides reinforcing or fun effects