Filtro SII 6,5nm 2"

Shortly:

• Permeable to the emission line of sulfur
• For planetary nebulae, emission nebulae and supernovae
• Including individual test report

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.

The narrow passband of this filter with a bandwidth of only 6.5 nanometers works out the faintly glowing planetary nebulae, emission nebulae and supernova remnants or makes them visible even under difficult city conditions.