• NANO-B Series Variable ND: Includes 2.6 inches (67 mm) K&F Concept Variable ND Filter, Cleaning Cloth. Variable ND filters are double walled so if the variable ND filter is 67mm the lens cap will be 72mm • [Neutral Density Filter] ND filter reduces light and reduces overflow when shooting during daytime. Variable light can be adjusted from ND2 to ND400. It is very convenient because you don't have to have a lot of filters. Can be used for a variety of scenes, such as streaming, oceans, and waterfalls • [Caution] When there is a reduction of light, or when adjusted to ND 400 (near MAX), there may be cases of unevenness or bluish glow. Please note that this is normal. Keep rotating the filter and the shadow will disappear naturally. This phenomenon is not a quality problem, it is a natural physical phenomenon caused by rotation of variable ND • The ND filter allows for a wider range of aperture and shutter speed selection and more ideal color representation Can be used for a variety of scenes, such as streaming, oceans, and waterfalls • Please note that this product will be shipped randomly with new and old packages, but the quality of the contents does not change