iOptron Filters SII 1,25" (87502)
167.13 £
Tax included
The SII narrowband filter is designed for nebula astrophotography and transmits light centered at a wavelength of 672 nm. With a narrow bandpass, it enhances contrast and isolates sulfur emission, making it well suited for imaging emission nebulae, planetary nebulae, and supernova remnants. For astrophotographers seeking the classic Hubble Space Telescope–style appearance, such as the iconic “Pillars of Creation” in the Eagle Nebula (Messier 16), the SII filter is a natural addition after H-alpha and OIII filters. Like H-alpha, SII operates in the deep red region of the spectrum near 672 nm.