This particular filter allows light transmission in the doubly ionized oxygen wavelengths. This is particularly good for viewing double star systems where a lot of emissions are in the doubly ionized oxygen range.
Oxygen III (O-III) are great for viewing diffuse and planetary nebulae. The views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae are dramatically improved.
Ships to most international destinations, APOs, and FPOs.
Dimensions & Specifications
Telescope Accessories Series
Oxygen III Filters
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Default manufacturer warranty.
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