Nebula Filter Oxygen III 2.0-inch 200-300 Length 157mm

Length 157mm

a smartphone adapter is included for easy astrophotography

Its 70mm aperture and 350mm focal length provide bright

The package includes a 25mm Plössl eyepiece

Nebula Filter Oxygen III 2.0-inch 200-300 Length 157mmExplore 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