ExpoImaging ExpoAperture2 Manual (Imperial/Standard) - Manual (Page 19)

ExpoAperture 2 Depth-of-Field Guide Manual
V 1.0
19
2.I - Close and Macro Photography
Setting the Aperture for a Depth-of- Field Ranging from 12”to 24”
The inside ring on the Distance Dial (white numbers a blue background) provides
measurements from 12” to 24” for close and macro shots. Use these measurements in the
standard manner (described previously for depth-of-field from 2’ to infinity) to find the
preferred aperture setting for your distance range. The following example takes you through
the procedure for determining depth-of-field between 12” and 24”.
EXAMPLE:
What aperture setting should a photographer use to have all subjects from 15” to 18” in
focus using a 35mm camera and a 50mm focal length?
STEP 1 –
On the Distance Dial’s blue ring, find the range of
distances that you would like to be in focus, this case, 15”
to 18.”
STEP 2 -
Count the number of zones within the distance range. The
alternating gray and white arcs each represent one depth-
of-field zone. There are 4 zones between 15” and 18”.
STEP 3 -
Find the middle of the number of zones in your range and set your camera’s focus distance
accordingly. On your camera, set the focus distance to the distance corresponding to the
middle of the 4 zones (2 zones on either side). In this example, the camera focus should be
set at 16.5 inches to get a depth-of-field of 15” to 18”.
STEP 4 –
Turn the Guide over and select a focal length of 50
mm on the Focus Zone Dial.
STEP 5 –
Find the amount of zones in your range on the front
of the Depth-of-Field Guide to get your aperture
setting.
The f/stop above the number 4 in the gray area on the
Focus Zone Dial indicates that f/18 is the largest
aperture capable of providing 4 depth-of-field zones
with a 50 mm lens. Therefore, a photographer
shooting with a 35mm camera at 50mm needs to shoot at f/18 to have a depth-of-field from
15” to 18”.