Quote (jayandnix @ Oct 30 2010 11:30am)
that all depends on the speed of the flowing water
True, but there are small waterfalls involved here which will be falling at enough speed.
Quote (SeaBas @ Oct 30 2010 11:35am)
Doesn't have to to make any difference. Leafs will never be 100% sharp with a slow shutter speed. As long as you have a tripod you can make exposures of an hour that are still sharp as long as you have a more static subject of course.
Not totally true, because the wind and other things are going to move the tripod a bit also. Put your camera on live-view mode, zoom in 10x and you can see that movements that you can't see or feel still cause slight camera movement. The leaves won't be 100% sharp at 1 sec or 1/4 sec either, but they'll be a lot sharper than they are at 75 secs.