Orion 5657 2-Inch UltraBlock Narrowband Eyepiece Filter
Product Description
Orion 5657 2-Inch UltraBlock Narrowband Eyepiece Filter
- 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. Metal filter cell construction.
- Save yourself a trip to dark skies - with the UltraBlock filter you can enjoy the stars from the suburbs!
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.
Technical Specifications
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