Depth-Of-Field Guide - Honeywell ESII User Manual

DEPTH-OF-FIELD GUIDE

Depth of field is the range between the nearest and farthest distances which are in focus at a given lens
aperture.
If you want to know how great the depth of field is at a certain aperture, look at the depth-of-field
guide. In the photograph below, the distance scale is set at 5 meters . . . the lens is focused on a subject
5 meters away. The calibrations on each side of the distance index correspond to the diaphragm setting
and indicate the range of in-focus distance for different lens apertures. For example, if the lens opening
of f/4 is to be used, the range on the distance scale ring covered within the figure 4 on the depth-of-field
guide indicates the area in focus at that lens opening. You will note from the depth-of-field guide in the
photograph that the range from approximately 4.5 to 6.5m is in focus. Note that as the lens apertures
change, the effective depth of field also changes. For the depth of fields at different apertures and
distances, refer to the next page.
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