Orion UltraBlock Narrowband Filter - 2" Round Mounted

  • The Orion UltraBlock is the ideal eyepiece filter for deep-sky observers located at highly light-polluted sites
  • Narrowband filter blocks all forms of light pollution
  • Enhances the presence of a significant number of fainter deep-sky objects
  • Compatible with threaded Orion 2" eyepieces
  • Save yourself a trip to dark skies - with the UltraBlock filter you can enjoy the stars from the suburbs!
  • Sale
  • Regular price $99.99

More on the Way in 14 - 28 business days

Add to Wishlist
Already have gear? Trade it in for cash or new equipment.

Accessories Added

OPT Telescope Expert

Want Help?

Ask Our Telescope Experts


Orion UltraBlock Narrowband Filter - 2" Round Mounted

If you observe from highly light-polluted sites, or if you want the maximum contrast enhancement in observing faint emission nebulas from areas of moderate light pollution, an Orion UltraBlock telescope filter is for you. With an UltraBlock, emission and planetary nebulas are even visible from urban areas, where they are completely invisible without a filter! In darker-sky locations with only moderate light pollution, many objects will appear significantly enhanced over unfiltered and wideband filtered views.

Orion UltraBlock Telescope Filters block all forms of light pollution, including both narrowband mercury- and sodium-vapor lighting and broadband light pollution sources. UltraBlock Filters reject pollution from incandescent and fluorescent lighting, which wideband filters can't 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.


Filter Side Adapter SizeRound
WarrantyOrion Limited Warranty
Customer Reviews
5.0 Based on 1 Reviews
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
Hunting in the deep sky

absolutely necessary using a 16"