Canon EOS 1V Troubleshooting Guide download pdf (Page 121)

121

Basic Photography Terms

Depth of field

This is the range where acceptable focus can be achieved in front of and

behind the point of optimum focus. The smaller the aperture (the larger the

f-number), the deeper the depth of field. And the larger the aperture (the

smaller the f-number), the shallower the depth of field.

The depth of field is affected as described below:

(1) A smaller aperture (a larger f-number) increases the depth of field.

For example, stopping down to f/8 obtains a greater 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 is longer than the

depth of field in front of the point of optimum focus.

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

Depth of field

Point of optimum focus

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Canon EOS 1V Troubleshooting Guide Page 121