Find a subject in front of a background with depth. Take a very close viewpoint and zoom in; you’ll need to be aware of the minimum focusing distance of your lens. Focus on the subject and take a single shot. Then, without changing the focal length or framing, set your focus to infinity and take a second shot.
I chose to take these photos down at our local car recycling centre. I aim to go back and do a retake of this as the second image the distance is still unfocused. This was noticeable when I uploaded them. I will upload my retry below the first attempt.
RETRY:
Today I went back to the same area to retry this exercise.
Again without moving the camera, select a very small aperture (perhaps one stop above the minimum to avoid diffraction) and find a point of focus that will give you acceptable sharpness throughout the entire field, from foreground to infinity. Take a third shot and add it to the first two to make a set. (Please see my attempt below).
I chose aperture F4.0.
Heather Wade OCA Blog 