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Celestron Oxygen III Narrowband Filter - 2"
$124.95
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}The Celestron Oxygen III Narrowband Filter - 2" is an essential accessory for astronomers and astrophotographers. Specifically designed to isolate the two doubly-ionized oxygen lines (496 and 501 nm lines)...
Celestron Oxygen III Narrowband Filter - 1.25"
$94.95
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}The Celestron Oxygen III Narrowband Filter - 1.25" is a specialized tool for astrophotographers and astronomers, designed to enhance the observation and imaging of planetary and emission nebulae. This filter...