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Home > Classifieds > Astromart Classifieds > Filters > Classified #286073

For Sale: Orion Ultrablock 1.25" Filter SOLD [SOLD]

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This filter is Orion's version of the UHC filters made by Lumicon and Thousand Oaks, especially useful for viewing emission, reflection, and planetary nebulas. The Ultrablock is not as restrictive as the Oxygen-III filters, and therefore more useful in smaller aperture telescopes (up to 8") for a wider variety of objects than the O-III or Hydrogen filters.

USPS Money Orders preferred.

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