10 oo, Checking the depth of field, Uu ml 1122 a – Canon A-1 User Manual

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UU Ml 1122 A

Checking the Depth of Field

There are two ways to find out what the
depth of field is. One is by using the depth
of field scale which is a series of f/stops

repeated on each side of the distance index

mark on the lens barrel. The scale differs

according to the lens. First focus your
subject. Find the two f/stops on the depth
of field scale which correspond to the

aperture you or the camera have set for the
exposure. Draw imaginary lines from these
two

f/stops

the

distance

scale.

The

effective depth of field extends between

those two distances. For example, using a
standard 50mm lens focused at 3m with the

aperture set at f/8, depth of field extends

from 2.4m to 4.5m. Any subject from

2.4m to 4.5m away will be in reasonably

sharp focus in the image.

You can also visually check the depth of