Nikon PC NIKKOR 35mm f-2.8 User Manual
Page 15
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Depth of Field
Depth of field refers to the zone of acceptable focus
extending in front of and behind the plane of sharpest
focus. Within this zone, image blur is negligible and
everything can be considered as being in sharp focus.
To observe the depth of field with the PC-Nikkor lens,
it is necessary to manually set the diaphragm to the
required shooting aperture; for procedures, refer to
“Setting the Aperture” on page 6.
Depth of field can also be determined by reading the
color-coded depth-of-field indicators engraved on the
lens barrel opposite the distance scale. Each pair of
colored lines corresponds to an f/number of the same
color engraved on the lens front rim. To find the depth
of field at a particular aperture, focus the lens on the
subject and then check the numbers on the distance
scale opposite the colored lines that match the color
of the preset shooting aperture setting.
When in doubt about depth of field for a critical
shooting situation, refer to the tables on page 20 and
21 of this instruction manual.