Kenko PRO1D SMART VARIABLE NDX3-450, Adjustable Neutral Density Filter

ND filters reduce the amount of light entering the camera through the lens, allowing you to take pictures at longer-than-normal shutter speeds or to match the frame rate and shutter speed when shooting video.
In both cases, these filters are a necessity when shooting in excessively bright situations.
Variable ND filters are useful filters that allow you to adjust the amount of light reduction.
ND filters usually have a fixed density and only a fixed amount of light reduction, but the Variable ND filter allows you to freely set the density by rotating the frame.
The great advantage of the variable ND filter is that you can set the density according to the surrounding environment without the need to carry around many ND filters.

Note:
・As you get closer to the darker density, the more unevenness may occur. This is a characteristic of the product.
・Due to the design of the filter frame, the diameter of the front filter is one size larger than the diameter of the installed filter. (In the case of a 49mm filter, the front side is 52mm