The Effects of f-stop on Depth of Field

Click on any photo to enlarge

Photographer focused on blocks in the foreground, about 4 feet away
2nd row of blocks about 7 feet
third row of blocks and box about 15 feet

all photos taken with a 70mm Canon lens

Cropped view of the above photo
information in this photo is about 15 feet from photographer
focus was set to about 4 feet

ISO 400   f/2.8   1/320 sec.
70mm lens
ISO 400   f/5.6  1/80 sec.70mm lens

ISO 400   f/11   1/20 sec.70mm lens

ISO 400   f/22   1/5 sec.70mm lens

ISO 400   f/32   0.3 sec.70mm lens