In the Uk Edition of Digital Photo this month, there is a piece about focus stacking. For those that have not heard about it, it is the process of taking multiple shots of the same scene but with different focal points and then merging them into 1 shot so that all (or what the bits you want) are in focus. So for instance using F8 instead of F22 to take the shots and then merge.
I have done some searches and this seems to be more used in macro photography. The article, and what I want to do as well, was on a landscape.
Anybody done this?
If you use a tripod, how do you get, let's say, 3 shots with different focal points without moving the camera? Or is it best to take roughly the same shots with the different focal point and then merge.
I know this is DOF and hyper-focal related, but I wanted to try this technique.
Many thanks for any help.

