Notice how the size of the leaves in the planter gets much bigger while the size of the round windows on the door remains about the same. The depth seems to increase because the camera was brought closer to the subject.

Depth offocus

When you focus your lens on a subject (the lamp post in our example) the depth of field will change depending on the F stop you are using.

Just as in the previous example, the closer the subject is to the camera, the shallower the Depth of Field.  These three photographs are all focused on the same subject (planter-box in the middle of the hallway) and were taken with the same F stop and shutter speed, the only difference is the distance of the camera from the subject being photographed. The photographer kept walking closer to the subject (planter box).

Depth offield photography

Photography: What, How, Why Copyright © 2023 by Maria Politarhos and Randy Matusow is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

These three photographs above are all focused on the same subject (bird feeder) and were taken with the same F stop and shutter speed, the only difference is the distance of the camera from the subject being photographed. The photographer kept walking closer to the subject (bird feeder).

Depth offield photography examples

The larger the opening of the lens (small F Stop number) the less the Depth of Field. Only the person is sharp when using F 1.4 and the background appears blurred/out of focus.

The smallest opening (large F stop number) the greater the Depth of Field. The person and the background are sharp when using F 22.

Shallowdepth offield photography

Shallowdepth offield

Notice how the size of the leaves in the bird feeder gets much bigger while the size of the windows directly behind the feeder remains about the same. The depth seems to increase because the camera was brought closer to the subject.

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Depth of Field (DoF) refers to the distance between the closest and farthest objects that appears acceptably sharp in a photograph.