Canon ELAN7NE-30V, ELAN7NE-33V manual Depth of field, Basic Photography Terms

Basic Photography Terms

Depth of field

This is the range where acceptable focus can be achieved in front of and behind the point of focus. The smaller the aperture value (the higher the f/number), the deeper the depth of field. And the larger the aperture value (the lower the f/number), the shallower the depth of field.

The depth of field is affected as described below:

(1)A smaller aperture value (a higher f/number) increases the depth of field.

For example, stopping down to f/8 obtains a deeper depth of field than f/4.5.

(2)A lens with a shorter focal length increases the depth of field.

A wide-angle lens obtains a deeper depth of field than a telephoto lens.

(3)A longer distance between the camera and subject increases the depth of field.

(4)The depth of field behind the point of optimum focus (2) is longer than the depth of field in front of the point of optimum focus (1).

Depth of field

Point of optimum focus

12

Aperture set to f/2. Aperture set to f/22.

90