[4-Stop Exposure Reduction]- The gradual neutral density filter provides 4-stop exposure reduction, which is specially designed for shooting scenes with a large contrast between the sky and ground. It properly exposes the sky without underexposing the ground | [Premium Material]- 16-Layer multi-resistant MRC Coating significantly reduces lens flare and ghosting while making the filter anti-scratch, oil, and water-resistant. The transition of the filter is even and smooth, following the distribution of the natural light, to avoid black lines on the image caused by the rigid transition. Besides, the frame is made of aviation aluminum alloy ensuring durability, and thickness is only 4.6mm, which prevents wide angle vignetting | [Tips]- This 49mm grad ND filter is compatible with most 49mm camera lenses. Please verify your camera's lens thread size. On all lenses from Canon, Nikon, Olympus, Samsung, Fuji, and other manufacturers there is a printed by a "ø" (diameter) symbol that determines the filter size | [Double Thread Design]- This soft grad filter adopts a double-sided design to mount & stack multiple filters, lens cap, or other accessories for other optical effects like warming, ultraviolet, macro photography, etc | [Moisture-Proof Storage Case]- Comes with a delicate and portable filter case. Each circular neutral density filter can be fixed firmly in the case via the custom-fitted sponge cushion. Moreover, the moistureproof interleaving paper and the sponge cushion at the bottom effectively protect the variable ND filter from moisture and impact