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Lumicon Oxygen III Filter - 1.25" OIII

  • Isolates the two doubly-ionized oxygen lines
  • Blocks the rest of the overall spectrum of light
  • Extreme contrast
  • Ultra hard, vacuum-deposited coating
  • Eliminates the un-natural colored halos surrounding bright stars

Oxygen III 1.25-inch Narrowband Filter for Telescopes isolates just the
two doubly-ionized oxygen lines (496 and 501 nm 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.
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