Zomei 58mm Fader Variable Nd Filter Adjustable Nd2 To Nd400 Nd2-400 Neutral Density For Canon Nikon Hoya Sony Camera Lens 58mm - Camera Filters - AliExpress
K&F Concept ND2-ND400 Blue Multi-Coated Variable ND KF01.1401
Amazon.com : JJC 49mm Variable Neutral Density Filter ND2 to ND400, Slim Fader ND Filter for Canon EOS M6, M6 Mark II, M5, M50, M50 Mark II, M200 with Canon EF-M 15-45mm