Increasing the exposure time by a factor of 1000x is great to for use
Movements of rivers, waterfalls, surfs, clouds etc. to make shallower.
The filter creates this very well with a steady course. Attention:
the automatic white balance of the camera is almost always next to gray filters.
The white balance can also be adjusted in post-processing without problems.
The processing is also at the highest level. The holder is made of metal and the glass is stuck in it.
I am very happy with this filter and can recommend it without any restrictions.