Nikon D5100 Experience Manual page 61

Nikon D5100 Experience
focus on the middle person so that all three are in focus if you use a medium aperture setting
such as f/8 (or will vary depending on your lens focal length, distance to subjects, etc.).
Figure 38 – Aperture set at f/16, deep depth of field – image in focus from near to far
Figure 39 – Aperture set at f/8 – image in focus at middle distance, but appears out of focus at
near bricks and at distant bricks.
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