Nikon FM, Инструкция по эксплуатации

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DEPTH OF FIELD - continued
Depth-of-Field Indicators
The Nikkor lens’ depth-of-field indicators come in the form
of the three scales fitted on the lens barrel. The first is the
lens aperture scale, with the f/numbers colorcoded. The sec-
ond consists of two sets of colored lines, the colors corre-
sponding to the colors of the f/numbers. The third is the fo-
cusing scale which is calibrated in meters and feet.
To determine depth of field, note the color of the f/ number
in use. The depth of field at the taking aperture is indicated
by the numbers on the focusing scale which are adjacent to
the colored lines that correspond to the color of the f/number
set.
Example
Taking aperture: f/16 Color: Blue
Focusing distance: Sm
In the example above, the farthest point of sharp focus be-
hind the subject is infinity (on); this is the figure on the fo-
cusing scale which is adjacent to the blue line on the second
scale, which in turn corresponds to the blue color of the f/16
setting. The closest point of sharp focus is 2.7m, although
this number does not appear in the focusing scale.
Note that for exact depth-of-field determination, you should
refer to the depth-of-field tables in the instruction manual
for the Nikkor lens in use.