Perhaps one of the most iconic uses for an ND filter is using it outside with a slow shutter speed to catch a motion blur effect -- suppose mover water (waterfall, river, creek, ect). So I'm familiar with the underlying theory: the ND filter will keep the shot from becoming over-exposed while the slow shutter speed allows one to capture the motions as a blur. However, I'm struggling with the creative side. There don't seem to be many other applications like that out there.
Aside from moving water, what other motion blur applications can one achieve with an ND filter? Especially, any classic or "textbook" examples that are comparable with the moving water + ND shot?
I suppose in principle, any fast moving object would be suitable, but I don't see too many photographers use anything but moving water. I'm just having trouble extrapolating this technique because all the literature on the topic uses the same example (moving water).
- Assume any variety of ND filter you want (8-32)
- Context is outdoors (mostly landscape)