Amazon.com : Cokin X-Pro W960 Pro Graduated Neutral Density Filter Kit, Includes Cokin X-Pro 121L, X-Pro 121M, X-Pro 121S Filters, X-Pro Filter Holder and Storage Case : Camera Lens Neutral Density Filters :
COKIN FILTRE NUANCES ND-X VARIABLE ND2-400 (58mm)
Filters
Amazon.com : PROfezzion [2 in 1] 82mm ND Filter [ND2-ND32] and CPL Polarizer Polarizing Filter, Variable Neutral Density Adjustable Fader with 5 Hard Stops for Canon/Nikon/Tamron/Sigma Lenses : Electronics