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OIII 3nm Narrow Band filters isolate the doublet emission of doubly ionized Oxygen.
SII filters isolate the emission from ionized Sulfur atoms, also common in nebulae.
Chroma H-Alpha 5nm Narrow Band Filter
The Chroma H-Alpha 5nm Filter is essential when imaging objects rich in ionised hydrogen, works well in light polluted areas and moonlit conditions.
Chroma H-Alpha 8nm Narrow Band Filter
H-alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen.
The Chroma OIII 5nm Filter isolates the 500.7nm primary emission line of doubly ionized oxygen, which is the second most important imaging line after Ha.
OIII 8nm Narrow Band filters isolate the doublet emission of doubly ionized Oxygen.
SII filters isolate the emission from ionized Sulfur atoms, also common in nebulae.
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