ProMaster Variable ND Filter - HGX PRIME - ASAP Photo and Video
Amazon.com : JJC 72mm ND Filter ND2-2000 VND Variable Neutral Density Fader for Sigma 18-35mm f1.8, Nikon Z 24-70mm f4 S, Sony FE 16-35mm f4, Canon EF 35mm f1.4L II USM Lens
K&F Concept Nano-X ND2-ND32 Green Multicoated Variable KF01.1375
Amazon.com : 58mm ND Variable Neutral Density Filter for Canon EF 50mm f/1.4 USM Lens : Electronics