Polaroid Optics 49mm Neutral Density Filter kit w/ [ND3, ND6 & ND9] Filters for Light, Exposure & Shutter Control Includes Nylon carry Case- Compatible w/ALL Popular Camera Lens Models 3-PIECE NEUTRAL DENSITY FILTER SET  ND Filter Collection [ND3, ND6 & ND9] Provides Ultimate Control Over Light Exposure, Shutter Speed & Color Integrity While Allowing for Wider Aperture Settings PREVENTS OVEREXPOSURE OUTDOORS  Filters Limit Light Passage Through the Lens in Bright Conditions to Balance Color, Ensure Optimal Focus & Control Depth-of-Field for Landscapes & Similar Scenery DUAL THREADED DESIGN Smooth Threads Easily Affix to Any Lens; Double-Sided Design Also Lets You Mount & Stack Multiple Filters for Ideal Neutralizing Effects & Other Optics Like UV, Warming, Polarizing, Etc. PRO-GRADE MC FILTERS  Polaroid Optic Filters use Pro grade Multi-Coated Glass Which Gives You Unparalleled Quality. Included is a Water-Resistant Nylon Carry Pouch to Protect the Filters. COMPATIBLE WITH ALL 49MM LENSES  To Ensure Perfect Fit, True Color, Optimal Saturation & Zero Detail Loss, Verify Lens Thread Size Based on 49 Marking on Lens Barrel or Underneath Lens Cap