The Lumicon 1.25″ Comet Filter, a narrow band-pass filter (25 nm), isolates the 501 nm OIII line and both C2 lines at 511 nm and 514 nm. The high contrast of the filter reveals the delicate ionized tail of gaseous comets, allowing you to see their full extent. The Comet Filter also helps you to better distinguish gaseous comets from dusty comets, which normally show little contrast gain.
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