Kenko
[No unevenness even with wide-angle lenses!] The Variable ND-W filter successfully minimizes X-zone unevenness even with a 24mm focal length lens. This is an Amazon-exclusive package color.
[Usable without X-zone unevenness in the range of ND2.5 to ND128] Compared to conventional products, the Variable ND-W has a wider density range where X-zone unevenness does not occur, and can be used evenly up to approximately ND128. (While the density itself can be reduced to around ND1000, X-zone unevenness is more likely to occur.)
[Aperture stop scale markings for easy visual indication of light reduction] Aperture stop markings have been added to the filter frame so that the approximate amount of light reduction can be easily seen. You can quickly set the desired density between 2 and 7 (ND4 to ND128).
[Kenko's meticulously crafted neutral gray specification that doesn't change the color when attached] While many variable ND filters have a yellowish tint, the "Variable ND-W" uses a neutral gray polarizing film that minimizes color cast when attached. Furthermore, although it uses a polarizing film, it is designed so that no polarization effect occurs.
[Filter diameter remains unchanged, allowing you to use your existing lens cap] Many variable ND filters increase the front filter diameter by one size, making it impossible to use your existing lens caps, etc. However, the "Variable ND-W" is designed with the front filter diameter remaining the same. You can use your existing lens caps and other filters without changing their size.