Amazon.com : K&F Concept 49mm Variable Fader ND2-ND32 ND Filter and CPL Circular Polarizing Filter 2 in 1 for Camera Lens No X Spot Weather Sealed : Electronics
Amazon.com : 49MM Lens Filter Kit by Altura Photo, Includes 49MM ND Filter, 49MM Polarizing Filter, 49MM UV Filter, (UV, CPL Polarizer Filter, Neutral Density ND4) for Camera Lens w 49MM Filters +
Amazon.com : K&F Concept 49mm Variable ND2-ND400 ND Lens Filter (1-9 Stops) for Camera Lens, Adjustable Neutral Density Filter with Microfiber Cleaning Cloth : Electronics
FOTGA 49mm Slim Fader Variable ND CAM Filter Neutral Density ND2 to ND400 ND8 for sale online | eBay
Filtro ND Hoya HMC ND4 49mm
Vivitar VMC 49mm ND-3 Lens Filter USA w/ Plastic Case -- | eBay