Quote Originally Posted by Kayaker72 View Post
Pat, first off, thanks. The reasons for ISO 800 were actually time and weather. When I first checked the exposure of the scene, I needed the 10 stop filter for a 30 sec exposure at ~ ISO 200 (which is hardly distinguishable to ISO 100, IMO). But, darker clouds moved in as I finished setting up and the first two shots were too dark. Rain start to fall during the second shot, so I bumped to ISO 800 and got the 3rd shot. By the time I got the camera back in the bag it was pouring rain.

So, if the rain hadn't started to fall in the second, I may have adjusted to the 6-stop ND. But I had little time and it was faster to adjust ISO. I do know what you are saying as noise starts to creep in pretty quick on the 7D, especially compared to the new models. There was noise in the shot that I smoothed out in post.
Thanks for the explination. Your shot looks good and clean, and I wanted to make sure I was not missing some great waterfall trick that I was not aware of. I hate getting my 7D up to ISO 400, and seldom get to 800 (how I wish for a 5D). I agree with you regarding the difference between ISO 100 and 200.