Thanks for the comments. Francois the sky was six stops brighter than the gorge with the waterfall and I did take a shot for the sky and blended it in. I am very happy with the result as most of my images where I have tried to capture scenes with extreme dynamic ranges end up looking odd. This one was blended by subtle masking, not using lightrooms often very good HDR. A third shot focused on the foreground was also blended in. Ken