Filtro SII 12nm 1,25"

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.

Line filters with a FWHM of 12 nanometers are interesting if you use a DSLR or a CCD camera with a higher dark current. The 12nm filters are also the first choice if your camera has an integrated guiding chip, because when using the 12nm filters you typically have twice as many stars in the image.