Celestron - Oxygen III (OIII) Narrowband Filter - 1.25" - 93623

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The Celestron 1.25" 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. Oxygen III filters are well suited to viewing gaseous and planetary nebulae.

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SKU: CEL-93623