The 2"Svbony OIII narrowband filters isolates just the two doubly-ionized oxygen lines (495.9nm&500.7nm) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light.
The 2"Svbony OIII narrowband filters isolates just the two doubly-ionized oxygen lines (495.9nm&500.7nm) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light.
Each Svbony 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 OIII filters of less sophisticated coating technology.
The OIII Filter is suitable for2" eyepieces
The 2"Svbony OIII filters suitable for viewing bright nebulae, and matching with large-aperture telescopes to observe linear spectrum nebulae,such as the M42 Orion Nebula under severe light pollution, emission nebulae, planetary stars & supernova remnants.
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