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Featuring true diffraction-limited optics with a wide-field f/6
a smartphone adapter
due to the over-sized knurled knobs that are attached to the end of each cable
precise manual tracking
and details begin to materialize that may not have become apparent to you at first glance
Nebula Filter Oxygen III 1.25-inch eclipse Featuring true diffraction-limited optics withExplore Scientific Nebula Filter 1. 25" O III Range from 483nm to 511nm with peak at 496nm. Transmission 96. 7% Oxygen III This is the highest contrast Nebula Filter in the series, a line filter for only the two emission lines of oxygen. A great choice for observations of supernova remnants and other nebulae that glow in OIII. Other types of objects that glow in all parts of the visible spectrum (e. g. galaxies) are reduced visibly, but some normally
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