Olympus Stylus 1, Instructions Manual

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DEPTH OF FIELD
Depth of field is the area of acceptable
sharpness in front of and behind the
subject in focus. This depth is deter-
mined by the F stop you have selected
and the distance from the subject in
focus to the film plane. As you get
closer to your subject or as you open
your lens (e.g. from F22 to F2.8) the
depth of field becomes shallower. By
stopping your lens down (e.g. from
F2.8 to F22) or getting farther away
from your subject this depth of field or
zone of acceptable sharpness can be
increased.
Another factor in determining depth of
field is the focal length of your lens. As
a rule the shorter the focal length, the
greater the zone of acceptable sharp-
ness. The longer the focal length, the
shallower this zone becomes.
The table above shows that when the
camera-to-subject distance is 3m (10ft),
the depth of field at F16 ranges from
1.93m (6ft) to 6.93m (23ft).
F1.8 (1/1000 sec.)
Depth of Field Table (F1.8 & F1.4 Standard Lenses) Circle of least confusion 1/30 mm
F16 (1/30 sec.)
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