Amazon.com : K&F Concept 49mm Variable ND Filter ND2-ND32 Camera Lens Filter (1-5 Stops) No X Cross HD Neutral Density Filter with 28 Multi-Layer Coatings Waterproof : Electronics
Amazon.com : JJC 49mm ND Filter ND2-2000 VND Variable Neutral Density Fader for Canon EOS M50 M50 Mark II M5 M6 Mark II M200 with EF-M 15-45mm Kit Lens, for Canon R10