You could always do that on an iPhone. . . but nowhere near as fast as a 64bit processor iPhone 6 can do it. . . and your Galaxy SIII can not do it anywhere nearly as fast or as well. Read the contemporaneous reviews of that phone from 2 1/2 years ago. . . and read the reviews of its decedents now and see how slow they are to focus and take a picture compared to any iPhone. Sorry. . . that was the point of this article.
So what am I to believe ... a bunch of “reviews” or my lyin’ eyes? You seem to have missed that I actually had an iPhone 5 in my hands for a couple of months. I KNOW how it works, and how fast it focuses. Not from a review, but from actual use and experience.
No thanks, buddy. I try to be objective. This article ... and fanboys of any sort ... not so much.
OBTW, my Galaxy S (no number) does the touch-and-focus thing, too.