Brand New 49mm NDX Variable Range Neutral Density Fader Filter Adjustable from ND2 - ND1000 for Pentax K-50 Neutral density can be adjusted from ND2 to ND1000. It is easy to create different neutral density by rotating the ring Apply slow shutter speed under strong sunlight exposure Large aperture is available to create depth of field easily Suitable for dynamic screen, waterfalls, streams, waves, etc. Index marks on the edge of filter for exact adjustment. Provides Total Versatility in Neutral Density Adjustments Adjustable From ND2 - ND1000, Multicoated Glass Construction Gives You Control of Any Lighting Environment Simply Turn Its Exterior Ring to Access Any of the Neutral Density Settings Save Time Changing or Adding Filters, Variable neutral density filter allows you to dial in differing amounts of density scene to scene Product information