This was the shot that had the centre of the flower in focus. It doesn't look quite as bright as the finished item because after Helicon you have to PP it in CS4 to tweak exposure and sharpen, etc.
TBH there wasn't much variation between the shots because as I said the flower was very small, so it had a shallow DOF. You would notice more of a difference in a series of a flower that had a greater depth. It does show what the 105 can do though. I could have used an extension tube and got in even closer.