Svbony Sv220 Telescope Filter, 2 Inches Dual Band Nebula Filter, H Alpha And O Iii Narrowband Filter For One Shot Color Cameras,

1.The 7Nm Dual Band Filter Is Designed To Reduce The Effect Of Light Pollution; Enhance The Contrast And Bring Out The Detailed Information When Imaging Emission Nebulae 2.You Can Enjoy The Fun Of Deep Sky Photography Anytime And Anywhere In Urban Areas; The Dual-Band Filter Helps Astronomy Enthusiasts To Perform Deep Sky Photography In Urban Areas With Serious Light Pollution Or Under A Full Moon 3.Lower The Threshold For Making Astronomical Works; The Dual-Band Filter Makes It Possible To Simplify And Decrease The Difficulty And Cumbersomeness Of Post-Processing For Users 4.Compared With Traditional Black-And-White Deep Sky Photography; Dual-Band Filter Can Achieve A Single Exposure To Capture Large Full-Color Images 5.Filter For Use With Dslrs; And Astronomical Telescopes Whose Focal Ratio Is Not Less Than F5.