kitkatdubs said:
So heres my question then, what would YOU typically shoot a maternity/family portrait of 3 at? Like I just want them all in focus...?
First off, for group shots, if the people are posed so that they are all the
same exact distances from the camera, depth of field at f/5 ought to be just adequate with a 50mm lens at any framing, from full-length vertical, to half-body horizontally frame (from the waist up), to even head and shoulders horizontally framed. But-- f/5 is just on the edge...if two people are in the back, or two are in front and one person is in back, and their heads are not posed close together--by you and by directions given to them, you'd more than likely want to be at f/6.3, or even better, f/7.1. The thing is--people often form loose groupings, unless they are directly posed by a photographer, and f/5 is probably going to leave "somebody" out of focus. Plus...there are also bodies involved...a woman's bustline can easily be rendered out of focus at f/5. Same with the legs of a person who is seated. Or the person in the back, who is not "squished in there tightly." I am not kidding...f/6.3, f/7.1, f/8--all are commonly used apertures for group portraiture.
THE CLOSER you are to the people, the more need there is for a higher aperture number, like 7.1 or 8 or even f/11. As you move the camera farther back, depth of field becomes deeper, and less-critical of exact, pin-point focus and extremely close posing/grouping.
At close distances, f/5 will often leave something important out of focus...nose...bust...ears...something. PLUS, at marginal apertures, there is basically no margin for safety, no margin focusing errors, no margin for people moving a little bit, and so on.