Exposure Compensation; Depth Of Field - Olympus OM-3Ti Instructions Manual

EXPOSURE COMPENSATION

The OM-3Ti also permits exposure compensation with
the exposure compensation dial in OTF auto flash
shooting. If the background is brighter than the subject,
turn the dial and set it to a (+) side position. The amount
of exposure is double on (+1) position, and four times on
(+2) position. If the background is darker than the
subject, turn the dial and set it to a (-) position.
If the compensation dial is turned, the +/- display in the
viewfinder blinks. The bar graph display shifts according
to the amount of compensation.

DEPTH OF FIELD

Depth of field is the area of acceptable sharpness in front of
and behind the subject in focus. As you get closer to your
subject or as you open your lens (e.g. from F16 to F2.8) the
depth of field becomes shallower. By stopping your lens
down (e.g. from F2.8 to F16) or getting farther away from
your subject this depth of field can be increased.
The table below shows that when the camera-to-subject
distance is 3m, the depth of field at F16 ranges from 1.93m
to 6.93m.
As you press the preview button, looking through the view-
finder, you can ascertain the actual depth of field.
Depth of Field Table (50mm F1.8 lens)*
Circle of least confusion 1/30mm
72