Orion 1.25" Oxygen-III Nebula Eyepiece Filter

The Orion 1.25" Oxygen-III Nebula Telescope Filter provides extremely selective filtration to bring out elusive detail in diffuse and planetary nebulas. It does so by transmitting close to 90% of the light corresponding to the two oxygen-III spectral lines at 496nm and 501nm while completely blocking virtually all other wavelengths.

You'll see more detail than you ever could before in nebular gems such as the Swan, Ring, Dumbbell, Helix and Eagle, to name a few. The O-III provides an even greater contrast boost on some objects than the UltraBlock narrowband filter.