Celestron 93623 Narrowband Oxygen III 1.25 Filter & 94105 Neutral Density Moon Filter 1.25", Black

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Celestron 93623 Narrowband Oxygen III 1.25 Filter Features

• Product 1: The 1-1/4" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light

• Product 1: Made in China

• Product 1: Package Dimensions : 3.0 L x 1.0 H x 3.0 W (inches)

• Product 1: Package Weight : 1.0 pounds

• Product 2: Reduces brightness and cuts glare, increasing clarity of the moon, Venus, and bright double stars

• Product 2: 13% light transmission

• Product 2: Provides a true Color image

• Product 2: Threads on to any Celestron 1.25” eyepiece

About Celestron 93623 Narrowband Oxygen III 1.25 Filter

Celestron 93623 Narrowband Oxygen III 1.25 Filter The 1-1/4" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects. Each filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology. Celestron 94105 Neutral Density Moon Filter 1.25", Black Neutral Density Moon filter 1.25"