In reply to Dr Avid:
> If you are standing on a small ledge and cant move about, you can get lots of different shots rather than the same one over and over that you'd get with a fixed focal length.
In this example, all things being equal, your "lots of different" shots ARE basically "the same one over and over" but with varying amounts of crop, surely?
I take your point though.
I was up on Flying Buttress at Dinas Cromlech with a single focal length and didn't once think "I wish I had a zoom". Mind you I didn't get to take many pics as we were climbing as a pair so I was generally busy with climbing, belaying or setting up a belay