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Celestron 2" Oxygen III Narrowband Filter.
Brand New
Includes Two Year Warranty. . The Celestron Oxygen III Narrowband Filter 2-inch Oxygen III Narrowband Filter is best for viewing nebulae. This filter transmit through the two doubly ionized oxygen lines that blocks the overall spectrum of light. This Celestron filter improves contrast while viewing diffuse and planetary nebulae. This gives a stunning views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects.
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The Celestron filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm.
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Oxygen III Narrowband Filter - 2"

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