SVBONY SV227 Telescope Filter, 2 inches SII CCD 5nm Narrow
SVBONY SV227 Telescope Filter, 2 inches SII CCD 5nm Narrow Band Filter for Deep Sky Astrophotography The SV227 SII filter blocks infrared wavelengths from 700nm to 1000nm so you don't need a separate IR-Cut filter 2 inch mounted; the filter can thread directly into the 2 inch barrel of your telescope eyepiece 300-1000nm wavelength range; the SVBONY SII 5nm 2" Filter transmits a 5nm bandwidth of light that is centered at 672nm SVBONY SII narrow band filter reduces other transmissions; including wavelengths of light that are responsible for light pollution The narrow bandwidth and high transmission rate of this filter...