Explore Scientific O-III Nebula Filter - 2" - 310200

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Explore Scientific Oxygen III Nebula Filter - Fits 2" Eyepieces Narrowband Nebula Filter Useful for viewing objects that glow in O-III light Bandwidth of 483 nm to 511 nm, peak at 496 nm 96.7% Transmission Fits 2" Eyepieces This is the highest contrast Nebula Filter in the series, a Narrowband line filter for only the two emission lines of oxygen. A great choice for observations of supernova remnants and other nebulae that glow in O-III emission light. Other types of objects that glow in all parts of the visible spectrum (e.g. galaxies) are reduced visibly, but some normally invisible regions of nebulae are clearly visible. This filter fits all standard 2" eyepieces and filter wheels. Show more