Minolta X-7A - Depth of Field

DEPTH OF FIELD
-A-
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5 7
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It
1.2
1.5
2
3 5 10
m
50
I ""1'.", I
2216 B 4 4 B 16 zz
'fur
1.7 2.8 4 5.B 8 11 16
'--""'. -- .~.-...... .. ........ -.......
28
-8-
'5 4 5 1 10 1530 a:>
1.2 1.5 2 3 5 10
1 , " 1 1'.1 1 1 I
~ " 22 16 34 4 B 16 n
1.7 2.8 4 5.6 a 11 16 22
ft
m
When a lens is focused on a given
subject,
there is a certain range
behind
and in front of the subject
which appears sharp. This range
is
called "depth of field" , and it varies
according
to the aperture set: large
apertures (e.g.,
f/l.7) yield a
shallow
depth of field rendering the
background out of focus (example
A); small
apertures (e.g., f/22) give
greater
depth of field with sharper
background (example
8). The depth
of field can be checked on the lens'
depth-of-field scale
as shown.
Depth of field also varies with
subject distance: when
the lens is
focused on a close su bject, the
depth of field is shallow; when
focused
on a distant su bject, the
depth of field is greater.