HOW MUCH FOCUS DO YOU NEED?
Best answer? It depends. This question relates to depth of field. This is a factor that plays an important part in how much we see. Our choices matter if we are to achieve our intended results. Choices are driven by intention. Do you want to have everything in focus, less than everything pr practically a whisper of detail? You make that choice first, then you choose your f-stop. If you are uncertain of the “best” setting, “run your apertures” from deep to shallow or vice versa. Later, view the series and make another choice for which images at what apertures work best for the intentions you had.
There are times when you want everything in focus for a particular subject. Take flowers, for example. You want to capture all the details of the blooms, but your background is too busy or too close for f/8 to f/11 to work. That’s when you might try focus-stacking (manually or via a function in your camera) at a wider aperture. My Nikon Z’s have that feature. I don’t use it very often because my style leans more in the shallow zone. That said, I figured I would make the effort so I could have an example for this post.
Note: Regardless of how you do the focus stacking, start your focus at the front of the image field (what’s closest to you). And, be aware that you can run into issues if you’re trying this on a flower on a breezy day.