Nebula Filter S-II 2-inch 6.5nm

The Explore Scientific S-II Nebula Filter is a premium narrowband filter designed to isolate the 672nm sulfur II emission line found in planetary nebulae, emission nebulae, and supernova remnants. With its 6.5nm passband, this 2-inch filter provides exceptional contrast suppression of light pollution, making faint nebular details visible even under urban skies. Each filter comes with an individual test report certifying optical quality, and the instrument is suitable for both visual observation and astrophotography applications.