Astronomik Filters SII 12nm 27mm CCD filter, unmounted (55063)
90.5 £
Tax included
The Astronomik SII 12nm Filter is a narrowband filter designed for CCD astrophotography, specifically for capturing emission nebulae. It isolates the ionized sulfur (SII) spectral line at 672 nm while blocking nearly the entire visible spectrum and infrared light, ensuring high contrast and minimal interference from skyglow or artificial light pollution.