Variable ND filters are primarily used when filming, as long exposure times must be used there. In order to have the right exposure at all times, it is important that you can adjust the ND filter. Inexpensive variable ND filters usually have a yellow tinge. This, of course, falsifies the white balance and the image effect. Unless you want it that way. I still like to use variable filters though. Especially for long exposures on water. But I've often been annoyed by the falsified color effect. The ND filter reviewed here is clearly not one of the cheap filters. It also comes in a very nice case when it arrives and it even has a handle that allows you to adjust it very comfortably on the camera. As you can see from the pictures, the color effect does not change. Aperture, shutter speed and ISO were the same in each case. Only the filter was adjusted. I think you can easily see the quality of the filter there.
In general, I would like to warn against turning on the filter too firmly or slightly crooked or using it at sharply changing temperatures. It happened to me several times that I couldn't get the filter off anymore. This was then only possible with the appropriate filter clamp.
I didn't have any problems with this one though.
I really like it. But that should be the case, as it also costs significantly more than the inexpensive league.
5 stars.