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16
FOCUSING
Focusing is always done at full aperture with Auto
Nikkor lenses. This gives the brightest possible image
on the focusing screen for easy viewing and compos-
ing. It also minimizes
depth of field so the image
snaps in and out of focus distinctly.
The
Nikkormat FT2
focusing screen
consists
of a
matte Fresnel field with a central 3mm@ split-image
rangefinder spot surrounded by a doughnut-shaped
1mm-wide
microprism for rapid, accurate focusing.
Look through the viewfinder and turn the focusing
ring until the two
halves of the central rangefinder
image coincide to form a single, sharp image, or until
the image in the microprism appears sharp and crisp.
This focusing screen is suitable for subjects with both
straight lines and ill-defined contours. However, when
used with lenses having a maximum
aperture smaller
than f/4.5, or in close-up photography, the rangefinder
spot is likely to darken. In this case, focus on the
surrounding matte field.
The lens can also be prefocused using the distance
scale engraved in both feet and meters on the lens
barrel.
Line up the white indicator line on top of
the lens barrel opposite the camera-to-subject distance
as measured or estimated. This technique is useful for
candid shots of elusive subjects when time does not
permit through-the-lens focusing.
Microprism/split-image screen
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