[Exposure Reduction & Color Balance]- This variable neutral density filter is specially designed for shooting dynamic scenes, such as waterfalls, streams, waves, or any fast-moving object. It reduces the amount of light reaching the film to achieve a neutral color balance | [ND2-ND400 9Stops Variable Fader ND Filter]-This variable ND neutral density filter can be adjusted from ND2 to ND400 by rotating the upper part of the frame, which reduces light intake (1 to 9 f-stops) and maintain an even color balance. It effectively controls the exposure during shooting and solves the problem of carrying multi-fixed ND filters | [Multi-Coated & Ultra-Slim Frame]- 16-Layer Nano Coating significantly reduces lens flare and ghosting while making the filter Anti-Scratch, Reduce Reflection, Water Repellent, Oil & Dust Resistant. The frame is made of high-quality & extra-tough aviation aluminum alloy ensuring durability, and the thickness is only 7mm, which prevents wide angle vignetting | [Choose your Size]- This 49mm adjustable ND lens filter adopts a Double-Thread Design, which has 49mm inner thread and 52mm outer thread. It 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. Moreover, this design allows you to mount 52mm thread multiple filters, lens caps, or other accessories | [Moisture-Proof Storage Case]- Comes with a delicate and portable filter case. Each neutral density adjustable filter can be fixed firmly in the case via the custom-fitted sponge cushion(except PF-NDV82 with a PP box). Moreover, the moistureproof interleaving paper and the sponge cushion at the bottom effectively protect the filter from moisture and impact