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Using step up rings to go from 72mm to 82mm so I can screw more stuff onto the end of my lens to avoid vignetting? : r/AskPhotography
How to Avoid Vignetting – NiSi Filters and Lenses for Camera and Cine-Beyond imagination
A Guide for Using Adapter Rings – NiSi Filters and Lenses for Camera and Cine-Beyond imagination
Amazon.com : NiSi 77mm Swift True Color ND-Vario | 1-5 Stops Variable Neutral Density Filter | Adjustable ND, True-to-Life Color, No Vignetting, Optical Glass with Nano Coating | Photography and Videography : Electronics