Tiffen 52mm ND 0.9 Filter (3-Stop) 52ND9 B&H Photo Video
Tiffen 52mm Variable Neutral Density Filter 52VND B&H Photo Video
52mm Fader ND2-32 (1-5 Stop) Variable ND Neutral Density Filter for Camera Lens - KENTFAITH
Amazon.com : 52mm Variable Neutral Density NDX Filter for Nikon Zoom Normal-Telephoto 55-200mm f/4-5.6G ED AF-S VR DX Zoom : Electronics
Tiffen 52mm Graduated 0.6 ND Filter 52CGND6 B&H Photo Video
Amazon.com : High Definition 52mm 10-Stop NDX Neutral Density Variable Filter for Olympus M ED 9-18mm f/4.0-5.6 Micro Four Thirds Lens & Olympus M.ZUIKO Digital ED 12-50mm F3.5-6.3 EZ Lens : Electronics
Amazon.com : 52mm ND Variable Neutral Density Filter for Nikon 32mm f/1.2 Lens : Electronics
52mm ND2-400 (9 Stops) Variable ND Filter Neutral Density Adjustable Filter for Canon Nikon DSLR Cameras - KENTFAITH
Amazon.com : Tiffen 52mm Neutral Density 0.9 Filter : Camera Lens Filters : Electronics