Scorpio Astro 2 inch 7nm Golden Duo-Band Filter . There are two types: HO and SO. HO is 7nmHa+7nm OIII, and SO is 7nm SII+7nm OIII. Using the duo-band filter can effectively improve the contrast of the image, making it easier to bring out the detailed features of objects that would otherwise be difficult to capture. It'll be able to take high-quality deep-sky images even in areas affected by urban light pollution and other light sources.It enables color camera users to shoot without the mono camera and H/S/O narrowband filter, providing more fun of astrophotography.

Parameter

• FWHM: 7nm±0.5nm
• OD:＞4
• Material:Golden Glass
• Thread: M48*0.75
• Glass thickness: 2mm ± 0.2
• Max Transmittance:＞85%

Package Includes
1.Scorpio Astro 7nm Golden Filter
2.Sturdy Plastic Cases