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In areas plagued with significant light pollution, our UltraBlock eyepiece filter greatly increases contrast of emission and planetary nebulas
Allows you to see features and details through a telescope that would normally be lost due to light pollution
Blocks 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
Use with any filter-thread equipped 1.25" Orion eyepiece. Metal filter cell construction.
The UltraBlock is the filter for deep-sky observers located at highly light-polluted sites. Blocks all forms of light
pollution - mercury vapor and sodium emission bands - while passing the critical hydrogen-beta and ionized oxygen
wavelengths. With an UltraBlock, emission and planetary nebulas surface from the washed out background sky. In dark
skies, the UltraBlock also enhances the sky presence of a significant number of fainter deep-sky objects over unfiltered
and wideband-filtered views.