The Wisdom of Step-Up and Step-Down Rings | B&H eXplora
NiSi 100mm Filter Holder for Nikon Z 14-24mm f/2.8 S (No Vignetting) | NiSi Optics USA
Testing a Step-Down Ring (86mm-77mm) (Quick Clip #65) - YouTube
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