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Orion UltraBlock Narrowband Filters
$99.99 - $124.99
Accepted Payment
  • Orion UltraBlock eyepiece filters greatly increase contrast of emission and planetary nebulas when viewing from areas plagued with significant light pollution
  • Using an UltraBlock eyepiece filter allows you to see features and details that would normally be lost due to light pollution
  • UltraBlock filters block all forms of light pollution while passing critical hydrogen-beta and ionized oxygen wavelengths of light
  • Enhances the sky presence of a significant number of fainter deep-sky objects
  • Available in both 1.25" and 2" sizes, compatible with 1.25" and 2" Orion telescope eyepieces threaded for filters

If you observe from highly light-polluted sites, or if you want the maximum contrast enhancement for observing faint emission nebulas from areas of moderate light pollution, an Orion UltraBlock filter is just for you. With an UltraBlock filter attached to your telescope eyepiece, emission and planetary nebulas are visible from urban areas, where they are completely invisible without such a filter! In darker-sky locations with only moderate light pollution, many celestial objects will appear significantly enhanced over unfiltered and wideband-filtered views. Orion UltraBlock filters block all forms of light pollution. They reject wavelengths from incandescent and fluorescent lighting, which wideband filters cannot stop. Extremely high (99.9%) blocking of critical mercury and sodium emission bands and very high transmission of hydrogen-beta and ionized oxygen wavelengths result in the highest contrast gain of any competing light pollution filter. Available in 1.25" or 2" sizes for use with either 1.25" telescope eyepieces or 2" oculars, Orion UltraBlock filters make views of emission and planetary nebulas better. Get one today for your own telescope eyepieces!

  • Warranty
    One year