Quote Originally Posted by conropl View Post
I did not get a 70-200 for a long time, but since going ff I find myself using that for a lot of landscapes... including waterfalls. I use it way more than I thought I would (when I can get out to take pictures). You can zoom in and isolate some of the interseting areas of the falls. Keep that in mind... sometimes the "wide angle" card is overplayed on waterfalls and everyone's shots end up looking the same.
It's true, a telephoto zoom can certainly be a good choice for waterfalls. However, the problem with them is that you need more distance between yourself and the falls in order to get the right framing. And once you move back, there's more of a chance that distracting objects (trees, limbs, etc) will obstruct your view of the falls. If you can find a clear view, though, a telephoto can definitely work.