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Optolong SII 6.5nm 1.25" filter
$159.00The SII 6.5nm from Optolong works fantastically as a photographic filter, but also works for viewing faint nebula. -
Optolong SII 6.5nm 2" filter
$250.00The SII 6.5nm from Optolong works fantastically as a photographic filter, but also works for viewing faint nebula. -
Optolong L-Pro 1.25" Light Pollution Filter
$149.00The 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. -
Astro-Tech Ultra High Contrast (UHC) narrowband for 1.25" eyepieces
$49.95This 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. -
LP-1 Broadband for 2" eyepieces
$159.50This 48mm filter for 2" eyepieces has a moderately wide 560 Ångstrom passband for use in slight to moderately light polluted areas. -
LP-2 Narrowband for 1.25" eyepieces
$79.50This 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. -
LP-2 Narrowband for 2" eyepieces
$159.50This 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. -
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LP-4 H-Beta Line band filter for 1.25" eyepieces
$79.50Very 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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