I recently purchased a Lee Filters ProGlass 10 Stop filter. This impressive Lee Filter is designed to eliminate pink color casting found in many other 10-stop filters.  I am very happy with the results produced by the filter on the Fuji X-T2. I didn't have to spend any time changing white balance in lightroom or tweaking the image to remove unusual pink colors. 

When using the almost totally black 10-stop filter, the Fuji X-T2 is able to accurately calculate exposure time with the normal light meter. I didn't need to spend any time calculating the exposure time before shooting, unlike using the Nikon D810, which requires the use of an exposure conversion chart. I was also able to compose the shot and lock focus, without removing the filter from the camera.  Just one more reason why mirrorless is ahead of DSLR cameras.