Depth of field is the distance between the closest and farthest objects in a photograph that are considered sharp and in focus. In the photo below, the fourth, fifth, and sixth individuals from the left can be considered as being in focus, while the others are not. The depth of field can be adjusted to match the desired type of photography. In portrait photography, it is desirable to have only the model's face in focus, with the background being out of focus (blurry) to help focus the viewer's attention on the model and prevent distractions from other objects. In landscape photography, everything from the nearest tree to the farthest mountains should ideally be in focus. In the photo below, the physical distance to the camera from the individuals, as indicated by the red lines, represents the area of sharpness. Four main factors primarily influence this depth: the camera's sensor size, the aperture value used, the focal length of the lens (focus distance), and the physical distance to the object you want to focus on. The calculator on the right calculates the estimated point where sharpness begins, where it ends, and the overall depth of field when these values are entered.
Camera Sensor Type:
Aperture:
Focal Length: mm
Distance to the subject:
Distance to Beginning of Focus:
Distance to Ending of Focus:
Total Depth of Focus