Thank you Thierry, Jeremy and Paulo. I appreciate your thoughts and comments.
To set this photo in context, there was a blustery wind that would swirl around the lake creating 'wind streaks', but very little else, i.e., waves were nonexistent due to the limited fetch. Those streaks are the dark areas on the water. The tree is sheltered from the main force of westerly winds by its position in a small cove, and was not greatly wind-shaken on this date. At the same time, the upper winds were moving the clouds rapidly across the sky (right to left, as viewed... if my memory is correct). I decided (for better or worst) to use a long exposure to capture this: 14 seconds with a 9-stop ND filter. (I do have faster exposures, and will get one processed and posted in a subsequent post.)
