Field of Wild Mustard

Camera settings for many images represent a compromise. In this shot, the f/16 aperture adds a little softening of the image due to diffraction, but still does not render the entire depth of "field" (pun intended) completely sharp. The front-most flowers are slightly out of focus. Using f/22 would have meant more softening of the entire image and a longer exposure (subject motion due to wind was already an issue) or a higher ISO setting (which would make more noise visible - especially in the sky).