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  1. Optolong SII 6.5nm 1.25" filter Optolong SII 6.5nm 1.25

    Optolong SII 6.5nm 1.25" filter

    $159.00
    The SII 6.5nm from Optolong works fantastically as a photographic filter, but also works for viewing faint nebula.
  2. Optolong SII 6.5nm 2" filter Optolong SII 6.5nm 2

    Optolong SII 6.5nm 2" filter

    $250.00
    The SII 6.5nm from Optolong works fantastically as a photographic filter, but also works for viewing faint nebula.
  3. Optolong L-Pro 1.25" Light Pollution Filter Optolong L-Pro 1.25

    Optolong L-Pro 1.25" Light Pollution Filter

    $149.00
    The Optolong 1.25" L-Pro light pollution filter is a great way to suppress the issues caused by all these lights that are all around us. This mounted filter can be used visually or photographically.
  4. Ultra High Contrast (UHC) narrowband for 1.25" eyepieces Astro-Tech Ultra High Contrast (UHC) narrowband for 1.25

    Astro-Tech Ultra High Contrast (UHC) narrowband for 1.25" eyepieces

    $49.95
    This Astro-Tech UHC 1.25" narrowband filter is designed for visually observing emission nebulas from heavily light-polluted areas. The filter has excellent transmission at the visually important emission lines of hydrogen-beta at 4861Å and doubly ionized oxygen at 4959Å and 5007Å. 
  5. LP-1 Broadband for 2" eyepieces LP-1 Broadband for 2

    LP-1 Broadband for 2" eyepieces

    $159.50
    1 Review(s)
    This 48mm filter for 2" eyepieces has a moderately wide 560 Ångstrom passband for use in slight to moderately light polluted areas. 
  6. LP-2 Narrowband for 1.25" eyepieces LP-2 Narrowband for 1.25

    LP-2 Narrowband for 1.25" eyepieces

    $79.50
    This 1.25" narrowband filter is designed for visually observing emission nebulas from heavily light-polluted areas. The filter has excellent transmission at the visually important emission lines of hydrogen-beta at 4861Å and doubly ionized oxygen at 4959Å and 5007Å. 
  7. LP-2 Narrowband for 2" eyepieces LP-2 Narrowband for 2

    LP-2 Narrowband for 2" eyepieces

    $159.50
    2 Review(s)
    This 48mm narrowband filter has a 280 Ångstrom passband for visually observing emission nebulas from heavily light-polluted areas using medium and long focal length 2" eyepieces. The filter has excellent transmission at the visually important emission lines of hydrogen-beta at 4861Å and doubly ionized oxygen at 4959Å and 5007Å. 
  8. LP-3 Oxygen III line band filter for 1.25" ep LP-3 Oxygen III line band filter for 1.25

    LP-3 Oxygen III line band filter for 1.25" ep

    $79.50
    1 Review(s)
    Product description coming soon . . . . . .
  9. LP-3 Oxygen III line band filter for 2" ep LP-3 Oxygen III line band filter for 2

    LP-3 Oxygen III line band filter for 2" ep

    $159.50
    2 Review(s)
    Product description coming soon . . . . . .
  10. LP-4 H-Beta Line band filter for 1.25" eyepieces LP-4 H-Beta Line band filter for 1.25

    LP-4 H-Beta Line band filter for 1.25" eyepieces

    $79.50
    Very steep cut-off slopes and a narrow passband make this 1.25" Thousand Oaks H-Beta filter ideal for viewing certain very faint emission nebulas like the California, Cocoon, and Horsehead.
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