Astronomik OIII 12nm CCD MaxFR 50mm Filter for Deep Sky Imaging circle 10mm (medium power)

10mm (medium power)

and a high optical density value indicates very low transmission

imaging brighter

coated on both sides of the substrate

Astronomik OIII 12nm CCD MaxFR 50mm Filter for Deep Sky Imaging circle 10mm (medium power)Astronomik OIII 12nm CCD MaxFR 50mm Filter Deep Sky Imaging MaxFR Astronomik photographic narrowband emission line filters are optimized for fast optical systems, such as Celestrons RASA and Takahashi Epsilon Astrographs. These filters are designed for high performance deep sky imaging and are ideal for capturing the three most important emission lines: oxygen (OIII), hydrogen (H alpha), and sulfur (SII). Available in both 12nm and 6nm bandwidth