Explore Scientific 2" S-II Filter 12nm

The Explore Scientific S-II 2" 12nm nebula filter is designed to enhance the observation of deep-sky objects, such as planetary nebulae, emission nebulae, and supernova remnants. By blocking almost all artificial light and allowing only the sulfur ionized emission line at 672 nm to pass through, this filter reveals hidden details and improves contrast, even under partially lit skies. With its 12nm bandwidth, it is ideal for amateur astronomers and astrophotographers looking to observe faint celestial objects in urban conditions. Each filter comes with an individual test certificate to ensure high quality.