Pixel NDX400 filters are constructed of two high quality polarizers with high transmittance index, which relative position allows to smoothly regulate quantity of light. Filters allow to longer time exposure with 8 2/3 stops (EV), what corresponds with range ND2 to ND400. Thanks to anti-glare layers colours on the pictures remain unchanged.
Pixel NDX400 filters allow to reduce quantity of light that reaches camera sensor. In effect it is possible to increase time exposure to obtain blur of clouds, or water. Filters can also be used to reduce depth of field in very bright lighting conditions.
For example maximum value of the NDX400 filter results with longer time exposure from 1/8000 to 1/40 with same aperture and ISO parameters. IN case of time exposure of 1 second and same filter parameters time exposure will be changed to 6 minutes and 40 seconds!