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Bright field focusing
1. You can start viewing and focusing
before and after cocking the rapid
wind lever.
When the preview lever
is in "AUTO" (automatic) position,
and the meter is at "OFF", the dia¬
phragm is fully open except for the
moment of exposure.
2
.
Turn the distance scale ring until
your subject image is clearly in focus.
It is not always necessary for you to
view and focus with the diaphragm
fully open. In bright sunlight, you can
easily focus with diaphragm closed to
f/5.6 or f/8 and still observe the depth
of field. It is easier, however, to fo¬
cus with the diaphragm fully open as
your subject image is much brighter.
When the letters "MAN" appears
beside the lever, the lens is in man¬
ual position; when "AUTO" appears,
it is in automatic position.
Microprism
Honeywell Pentax cameras have a
Fresnel lens with a microprism cen¬
ter underneath the ground glass. As
you look through the finder, you will
see that the Fresnel lens consists of
many concentric rings which provide
the brightest possible image on the
ground glass.
The microprism is the center por¬
tion of this diaphragm. When your
subject is in focus, the image in the
microprism will be sharp and per¬
fectly clear.
If your subject is not
in focus, the microprism will break
the image up into many small dots,
much like an engraver's screen. You
can focus your subject on any por¬
tion of the ground glass.
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