Went out the other night to try out the Cambo 4x5. Figured I would try some filters. By the 4th shot I was using 3 filters. A #8 yellow to darken the sky, a 2 stop split grad to increase exposure on the water, and a 6 stop little stopper to smooth out the water. After all the math in my head and adding reciprocity time from the Ilford chart I ended up with 12 seconds at F/8 on a 180mm lens. Getting an exposure App might simplify this. But it did turn out.