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  1. LP-4 H-Beta Line band filter for 2" eyepieces LP-4 H-Beta Line band filter for 2

    LP-4 H-Beta Line band filter for 2" eyepieces

    $159.50
    Very steep cut-off slopes and a narrow passband make this 2" Thousand Oaks H-Beta filter ideal for viewing certain very faint emission nebulas like the California, Cocoon, and Horsehead.
  2. 1.25" UHC Narrowband filter 1.25

    1.25" UHC Narrowband filter

    $89.95
    6 Review(s)
    This Celestron ultra high contrast (UHC) light pollution filter has improved contrast when compared with the wider passband of a broadband filter, making it easier to pick out faint nebulas . . .
  3. 48mm UHC narrowband filter for 2" eyepieces 48mm UHC narrowband filter for 2

    48mm UHC narrowband filter for 2" eyepieces

    $124.95
    2 Review(s)
    This 2" Celestron ultra high contrast (UHC) light pollution filter blocks out most unwanted light pollution, making it easier to pick out faint nebulas from suburban and dark sky observing sites alike . . .
  4. 1.25" Oxygen III Line band filter 1.25

    1.25" Oxygen III Line band filter

    $99.95
    2 Review(s)
    This Celestron Oxygen III light pollution filter has a very narrow passband for very high contrast on emission nebulas, making it a good choice for city and suburban observing . . .
  5. 48mm Oxygen III line band filter for 2" eyepieces 48mm Oxygen III line band filter for 2

    48mm Oxygen III line band filter for 2" eyepieces

    $139.95
    1 Review(s)
    This 2" Celestron Oxygen III light pollution filter has a very narrow passband that blocks out almost all unwanted light pollution, making it a good choice for nebula observing from city and suburban locations . . .
  6. Optolong L-Ultimate 2" Light Pollution Dual Passband Imaging Filter 3nm Ha/OIII Optolong L-Ultimate 2

    Optolong L-Ultimate 2" Light Pollution Dual Passband Imaging Filter 3nm Ha/OIII

    $389.00

    Take back the night sky by using the Optolong L-eXtreme 2" Dual Passband filter when imaging. Take your backyard imaging to places you never thought possible.

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