Extended User Manual – Irix 15 mm f/2.4
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DEPTH OF FIELD SCALE
ExAMPLE NO 2
In this image, the focus setting remains the same
as the first example, while the aperture setting is
changed to f/8.
Consulting the DoF scale, we can now use the two
numerals “8” on the scale to determine the distan
-
ces where sharpness will drop. Simply look for the
distances in feet or meters that align with the “8”s
on the scale to determine the closest (left “8”) and
farthest (right “8”) points that will be in focus.
You can verify the change in depth of field in the image. Notice
that the number of keys in focus has increased.
