As someone who likes to use their ND filters, this review was very interesting. I use 6 and 10 stop B+W ND filters. I often use the 6 stop ND filter as it has little to no color shift and suites more of my needs. But the 10 stop, as Bryan has shown, absolutely causes color shift but at time, say if you want to blur out people or the pool beneath a waterfall, it is needed. I typically correct the color shift in post.

I have been considering going over to a square filter like the Lee Big Stopper. Does someone know of a similar review including the Lee Big Stopper? I would be interested in how it compares.