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Thousand Oaks Optical Oxygen III Filter - 2" # LP-348

5.0 (1 Reviews) Read Reviews Write Review
Brand Thousand Oaks Optical
Part Number LP-348
Availability available

Product Info

Manufacturer Description

Oxygen III (OIII) filters are sometimes referred to as light pollution rejection (LPR) filters but their effect goes beyond the reduction of light pollution alone. This OIII filter is a bandpass filter that allows only a small portion of light in the visual doubly-ionized O-III portion of the light spectrum to be passed through the filter glass.

This filter will pass only a very small emission line centered at the ~496nm and ~501nm OIII lines. This is 93% of the spectrum of light usually emitted by diffuse, emission, and planetary nebulae. By rejecting most other light certain nebula will appear more clearly with sharper contrast against a blacker sky.


5.0 (Based on 1 Reviews) 100% of reviewers recommended this product.
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    1. aeajr

      aeajr Well-Known Member

      Skill Level
      Time with Product
      User Notes:
      Review by AEAJR of NY, USA.
      May 13, 2016

      5.0 Helped me see more of the Orion Nebula


      Easy to Use,Accurate



      I don't use it a lot but when I do it really brings out details of Nebulae that I can't see otherwise.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Manufacturer Thousand Oaks Optical