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Distance Scale • Depth
-of-Field
Distance Scale
Depth
-
of
-
Field
The Distance Scale is used to determine
the film-plane-to-subject distance. The scale
itself is composed of two parts, the Distance
Scale and Focal Length Scale.
After focusing, the correct distance can be
determined by locating the point at which the
curved line for the focal length in use inter-
sects the Distance Scale.
For example, if the 110 mm lens is
mounted on the camera and focused as
shown in the illustration, the subject is 1.5 m
(5 ft) from the film plane.
Depth-of-Field Preview
1. Set the Aperture Ring to the desired f-stop
and focus the lens.
2. Depress the Depth-of-Field Preview Lever
of the lens and you will be able to check the
depth-of-field directly on the focusing screen.
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Using the Depth-of-Field Scale
1. Check the camera-to-subject distance on
the Distance Scale.
2. Rotate the Lens Distance Scale Knob until
the previously noted camera-to-subject
distance is aligned with the center index of the
Depth-of-Field Scale.
3. Locate the selected aperture on both sides
of the Depth-of-Field Scale.
4. The figures of the Lens Distance Scale,
appearing above the selected aperture,
indicate the nearest and furthermost limits of
sharpness for that aperture.
For example, when the 110mm lens is
focused at 3 m and stopped down to f /32,
everything from approximately 2m to 10m will
be in focus.
When desiring to know the depth-of-field in
feet, rotate the Lens Distance Scale 180°, as
one side is in feet and the other in meters.