·Here Is A Special Blue Gradient Filter, Half Of The Lens Is Still Transparent Color, The Other Half Is Blue, Blue Gradually Deepened.·The Design Of Gradually Decrease Near The Center Of The Filter Allowing Emphasis Of Foregrounds Or Backgrounds. Color Of Lens Gradually Fades Out, So The Boundary Between The Colored And Transparent Sections Of Lens Will Not Become Apparent Even With The Lens Aperture Stopped Down.·This Filter Is Commonly Used In Sunny Outdoor Photography, Blue Filter To The Sky Side, So That Both Can Increase The Blue Sky Effect, But Also Reduce Part Of The Sky'S Light, To Prevent The Sky Exposure.·The Effect Of The Blue Gradient Filter Highlights The Blue Sky Background Covers The Foggy Scene.·This Filter Is Mounted On Rotating Frame, So You Will Be Able To Rotate The Coloring At Any Part Of Your Image. Giving Your Landscape And Skin Texture A More Colorful Touch.Package Includes:Dmk 67Mm Blue Gradual Filter---1Pc