That is interesting. I expect when they are creating set photos, they take a lot of photos with different angles and set ups.
I know there are some people who have the idea of Joseph being rather old, but it makes no sense. A carpenter isn't independently wealthy, so why would he start a family when he is reaching an age to be too old to work (carpentry is a physically demanding job)? Also, the average marriage age, even for men, was younger back then. If I had to guess, I would expect him to be in his 20s - old enough to have some stability but young enough to be able to reasonably expect to be able to provide for a large family.