This image was taken at f4 which is about the best aperture for m4/3 lenses. F/5 will probable give you the same sharpness with a little more depth of field.

As you can see, even at this size everything is in focus from near to far. I did have to process some distortion out of the image but it wan nothing too dramatic.

Again, I'm really glad I kept that 14-45 kit lens.