Have you never taken an un-aimed photo? I have. It's not exactly difficult. And I'd be pretty sure they had a hand held still camera as well as that chest mounted rig. But anyway...
Yes, of course they will have had a hand held one. I mean, that's the answer isn't it? Why chest mount the cameras if hand held ones do the trick?
Surely they would guarantee themselves good pictures if they used hand held ones. Why do you think they decided to mount those bulky cameras on their chests?
Can't you see the absurdity in it all?
5psi pressure in their suits and gloves we are told. You've felt a football haven't you? You know what 5 psi of pressure would do to gloves and suit and so would those that made the film, so they account for it by mounting cameras on the chest because they can't be held and operated by hand for obvious reasons.
They have to try and make it as real as they can so people don't pick up on discrepancies. Unfortunately they take pictures that are impossible on their supposed moon and the environment we are told it is.
The angle the picture was taken means it was taken by the person who's boot is in the picture, holding a camera downwards in a studio on Earth with no helmet ot any pressurirsed suit and gloves.