When I read that iStopmotion 3 could use iPhone as remote camera I was pretty exited - especially when I read that the program could control focus and exposure of the camera. I made a small test and heres the result:

1. Good thing: you can lock the exposure and white balance. This works pretty good.
2. Bad thing: allthough you can shift focus from the program (and it works) the way the iphone focus is apparently by zooming in and out untill it finds focus. This means that the picture will move if you shift focus in the same scene.

You can see my test here:

http://youtu.be/Yafc1f0zS0g

The picture shakes when I shift focus from one figure to the other.

I don't know if there is a workaround, but I think the problem is due to the iPhone not the program.

best
Ole