Sunrise came suddenly and the fog disappeared completely. I run over higher ground where I had seen a fallen tree. But already contrast was too much between the bright yellow middle ground and the background, more so in the tree line. So in a rush I inserted all of my three graduated filters at different levels and hoped for the best, letting the 1005-pixels Matrix Metering do its magic. As always, it did not disappoint me. But now I know I need in my bag a 5-stop ND Grad and a 3-stop reverse one.