Live vew question
On the K-7, if I understand correctly you must press the AF button to get the camera to focus. If you change the point that you want to focus on you must press the AF button again. This seems to be sort of the same as preview except that in live view you see changes in whatever you are taking a picture of as they happen.
I hope I am clear about what I am asking. I would like a clarification of how live view works and how it is used. I understand that you can see depth of field and all that but I think that would be pretty much the same as preview so what if anything is the advantage of live view and how do you use it?