Amazon.com : K&F Concept 58mm Variable ND2-ND400 ND Lens Filter (1-9 Stops) for Camera Lens, Adjustable Neutral Density Filter with Microfiber Cleaning Cloth (B-Series) : Electronics
K&F Concept variable ND2-ND400 (9 stops) 77mm - Frank Doorhof
Amazon.com: NEEWER 37mm Clip On ND2-ND400 Phone Camera Lens Filter Kit: Adjustable Neutral Density Filter with Phone Clip Compatible with iPhone 14/14Pro/14Pro Max Samsung Android Smartphones iPad and More : Cell Phones
58mm ND2-400 (9 Stops) Variable ND Filter Neutral Density Adjustable Filter for Canon Nikon DSLR Cameras - KENTFAITH