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