Today I was out shooting again using a ND10 filter. I use a Hitech Pro Stop 10 100 mm filter and a Cokin Z-Pro holder.
What I find really annoying is that I seem to be unable to get the proper white balance with this filter. I do shoot raw images and I also put a grey card in some of the shots for reference but no matter what I try I can't get the same colors as in reference shots that I do without the filter. I usually end up converting the image to b&w (which also looks nice).
From what I read on various pages on the net this seems to be a common problem with a lot of the ND10 filters.
What are your experiences with this type of filters and what filter do you use?