It is adjusted as the smallest factor, so you have a fairly expensive Polarizer)
Unfortunately, you can only rotate a disk and not both required. Ie. the polarizing effects are not well-controlled (hence a point deduction). But this is indeed officially a neutral density filter.
Why do you need an adjustable ND? To take a picture, I would certainly have bought a cheaper model, but since I am shooting with my DSLR movies and I like to work with 1.8 or 2,8er aperture is at helligten days the image at a shutter of 1 / 50-1 / 120s, completely overexposed. To compensate for the not with the visor (loss of depth of field) or with the shutter (loss of motion blur), I have done me this filter and I must say it met my expectations completely!
I set all the values as desired and only turn on the filter to the exposure to + -0 get. Genial should be in every movie suitcase.
The processing and packaging makes a very high-quality impression, the thread sits without problems and is turning smoothly.
! Not recommended for lenses in which the zoom / focus the front rotates while filming (see polarization effects)
Because this filter meets all my expectations and his mercy is very good, he gets me 4 of 5 stars due to the fact that nowhere is described which it is two polarizing filters.