Not if you stop before you hit the water.
How close to the water are you intending the drone to be?
If you are using the wideangle camera, remember everything will appear further away than it really is.
I will be using the wide angle and will hover about six feet above the waters surface. If I move sideways a few feet, will that pose a problem. I will head straight up again to about 50 feet to clear the lake...
I have a question for you Meta4
I plan on photographing colourful trees near a lake and want to descend from straight above and hover close to the water. Does going straight up and down pose a risk? I won't be flying low over the water to get to...