Acquired a new (to me) iPhone 6s recently and now I think I've won the battle to set it up the way I want it to work it is time to give the 12M pixel camera a try out. I was pleased it seems to focus right down to a couple of inches. These were taken with the Camera+ app as I am used to it and find it less confusing than the app which comes with iOS:
These are as taken, no retouching or even cropping.
21 hours ago