ExpoImaging ExpoAperture2 Manual (Imperial/Standard) - Manual (Page 11)

ExpoAperture 2 Depth-of-Field Guide Manual
V 1.0
11
2. - Using the ExpoAperture 2 Depth-Of-Field Guide
The ExpoAperture 2 Depth-of-Field Guide consists of several color-coded dials which can be
set to quickly perform depth-of-field calculations. The Guide enables you to easily
determine how to set your camera to achieve a desired depth-of-field, to determine what
depth-of-field you will achieve given your chosen camera settings, or to determine the
hyperfocal distance.
2.A - Distance Dial
The Distance Dial is used to determine the focal point and
the range of distance around the focal point that is in
focus.
The dial is divided into fifteen segments or “zones,” each
represented by an alternating gray or white segment. The
distances that fall exactly on the boundaries of the zones
are printed in red. Other distances are represented by
hash marks and their respective values. The outer portion
of the dial contains the distances from two feet to infinity.
The inner portion contains distances from twelve inches
to two feet.
2.B - Focus Zone Dial
When matched up with the appropriate f-stop the Focus
Zone Dial is used to determine how many zones are in
focus. There are roughly nine zones represented on the
dial by the alternating light and dark gray areas. Each
alternating gray area represents one zone and is the
equivalent of one zone on the Distance Dial. The dial also
contains a window for setting the focal length of the lens
being used using the Focal Length Dial.
2.C - Focal Length Dial
The yellow Focal Length Dial is located under the Focus
Zone Dial. The focal lengths on the dial range from 15mm
to 135mm. Rotate the Focal Length dial to set the Circle-of-
Confusion, sensor size or film format.
After setting your sensor size on the Circle-of-Confusion
Dial, hold the Circle-of-Confusion stationary with one hand
and select the focal length of the lens by rotating the Focus
Zone Dial with your other hand, until the correct focal
length shows in the window.