Astronomik SII 12nm Narrowband Filter

Enhance your astrophotography with the Astronomik SII 12nm Narrowband Filter. Designed to isolate Sulfur-II emissions, this filter effectively reduces light pollution, capturing stunning nebula details with exceptional clarity and contrast. Elevate your deep-sky imaging to new heights with the precision of Astronomik technology. The Astronomik SII-CCD filter is a narrow-band-filter for CCD photography.The filter lets the light of the ionized sulfur (SII) pass, and blocks nearly the whole remainder of the visual spectrum as well as IR, in which the CCD is sensitive.   The full width at half maximum (FWHM) of 12nm is optimal suitable for common CCD cameras and allows the use of very fast optics. The range of application extends from 1:2.8 to 1:15. Transmission losses and chromatic distortions, which arise with other filters, only occur with Astronomik filters when extremely bright aperture ratios of 1:2 and more come into play. It should be noted, that the filter has a transmission of up