Used Celestron Oxygen III Narrowband Filter - 2" Round Mounted - SOLD

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  • $49.00
  • Regular price $89.95

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Accessories Added

  • This is a used filter in very good condition
  • High grade optical glass
  • Enhances deep sky views


Used Celestron Oxygen III Narrowband Filter - 2" Round Mounted - SOLD

The Celestron 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.

Each filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology.


Filter TypeOIII
Warranty90 Day


  • Celestron 2" OIII filter
  • Original plastic case

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  • Hi, Can this fit to my 1.25' scope? I have a Celestron 6 GT EQ telescope.

    This is a 2" filter and will not fit 1.25" eyepieces or diagonals. You would want the CE-93623 1.25" version of the filter.