Vivitar 52mm 3Pc UV/CPL/ND8 Filter Kit + Top Accessory Kit for All 52mm Lenses - Walmart.com
Neewer HD Variable ND Filter (52mm, 3 to 7-Stop) 66602008 B&H
Irix Edge Neutral Density ND8 filter 52mm | Official Irix brand store
K&F Concept Nano-X Variable ND8 to ND128 Filter (52mm) KF01.1324
NiSi SWIFT FS ND Filter Kit with ND8 (3 Stop), ND64 (6 Stop) and ND1000 (10 Stop) for 52mm | 55mm | 58mm | 62mm Filter Threads + Case | NiSi Optics USA
K&F Concept 52mm Slim ND Camera Lens Filter ND8 -ND128 NO X Spot 3Stop -7Stop | eBay
Amazon.com : K&F Concept 52mm Magnetic Variable ND Lens Filter ND8-ND128 (3-7 Stops) + Magnetic Filter Basic Ring Kit, Adjustable Neutral Density Filter with 28 Multi-Layer Coatings Waterproof (Nano-X Series) : Electronics