Celestron Oxygen III Narrowband Filter - 2" Round Mounted - 93624 Tele Vue Eyepieces Dioptrx likely has better multi-coatings

Dioptrx likely has better multi-coatings than eyeglasses

Tele Vue prisms and mirror diagonals begin life as one solid chunk of metal-which is then continually refined to produce what you see before you now

a telescope'''s eyepiece holder or diagonal

The Infiniview LCD Digital Microscope is a verstaile tool that'''s just as useful out in the field as it is in a classroom

Remove rubber eyeguard to reveal bare eyeguard flange

Celestron Oxygen III Narrowband Filter - 2" Round Mounted - 93624 Tele Vue Eyepieces Dioptrx likely has better multi-coatingsAbout the Celestron Oxygen III Narrowband Filter 2" The Celestron OIII Narrowband Telescope 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,