Oxygen III / “oxygen” narrow band filter 1.25″ / 496 and 501nm.
The result is extreme contrast between the black
sky background and the faint photons of OIII light, the
for detailed views of the veil, ring, dumbbell,
Crescent and Orion Nebula are needed. Every filter has one
ultra-hard, vacuum-deposited coating that is carefully
was developed to cover the entire visual spectrum from 400 to 700 nm
to block. This eliminates the unnatural colored halos that
surrounding bright stars that are less sophisticated with O III filters
Coating technology are common eliminated.