[Exposure Reduction & Color Balance]- This 11stop 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 without affecting the color to achieve the desired effect that longer exposure times allow for smoother water movements, shallower depth of field, and blurred motion | [ND2-ND2000 Variable Fader ND Filter]- This variable ND neutral density filter reduces the light from 1 to 11 f-stops, which effectively controls the exposure during shooting. The vnd filter can be adjusted from ND2 to ND2000 by rotating the upper part of the frame, which effectively solves the problem of carrying multi fixed ND filters | [Multi-Coated & German Schott Glass]- The variable ND filter is constructed from a German famous brand optical glass that 9-layer nano-coating on each surface of the glass (total 18 layers), which significantly reduces lens flare and ghosting while making the filter anti-scratch, reduce reflection, water repellent, oil & dust resistant | [Choose your Size]- This 77mm ND filter adopts a Double-Thread Design, which has 77mm inner thread and 82mm outer thread. It is compatible with most 77mm 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 82mm thread multiple filters, lens cap, or other accessories | [Moisture-Proof Storage Case]- Comes with a delicate and portable filter case. Each neutral density filter can be fixed firmly in the case via the custom-fitted sponge cushion(except an 82mm filter with a PP box). Moreover, the moistureproof interleaving paper and the sponge cushion at the bottom effectively protect the filter from moisture and impact