Amazon.com : 52mm Variable Fader ND2-ND32 ND Filter and CPL Circular Polarizing Filter for Nikon NIKKOR Z 26mm f/2.8 Lens & Nikon NIKKOR Z 40mm f/2 Lens : Electronics
NIKON FILTER, 52MM ND 4X, WITH PLASTIC CASE/218219 | eBay
Amazon.com : 52mm ND Variable Neutral Density Filter for Nikon 32mm f/1.2 Lens : Electronics
Amazon.co.jp: Neutral Density Filters: Electronics
Fotga 46mm/49mm/52mm/55mm Adjustable Slim Fader Neutral Density (ND) Filter ND2 to ND400 for Sony/Canon/Olympus/Nikon/Leica Camera Lens, Photography, Lens & Kits on Carousell
Adjustable Neutral-density Filter ND2-400 52mm for Nikon AF Nikkor 50mm f/1,8D | eBay