Filtro SII Filter 1.25"

SII filter: The narrow-band filter lets the light of ionized sulfur atoms pass at 650 nanometers . This is the line in which many planetary nebulae, emission nebulae, and supernova remnants shine.

Astrophotography: It is best to use monochromatic cameras. Ideally, recording should be combined with SII, OIII and H-alpha filters. This results in an image that shows the delicate nebula structures in high contrast and clearly.