Honeywell Pentax Spotmatic Operating Manual page 8

OUT OF FOCUS
IN FOCUS
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I
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Automatic diaphragnl
When the preview lever is in "AU-
TO" (automatic) position, and the
exposure meter is turned to "OFF",
the fully automatic diaphragm is at
its largest aperture at all times, ex-
cept for the instant of exposure, no
matter what aperture is set on the
diaphragm ring. When you release
the shutter, the diaphragm automat-
ically stops down to the predeter-
mined aperture and the shutter cur-
tains start traveling instantly. When
the exposure is completed, the dia-
phragm reopens to maximum aper-
ture completely automatically
you are ready to compose, focus and
shoot your next pictures. If you wish
to visually check exact depth-of-field
before making the exposure, move the
preview lever to "MAN" (manual)
position. This stops the diaphragm
to the aperture selected and shows
you exactly how much depth-of-field
will appear in your picture. The pre-
view lever may be moved back to
"AUTO" (automatic) position before
or after making your exposure, or, if
you are making pictures in bright
sunlight, it may be left in manual
position, which permits a constant
check of depth of field.
*
When the exposure meter switch is
turned to the "on" position, the lens
diaphragm changes from
matic to manual position even though
the preview lever is in the "AUTO"
(automatic) position. When the shut-
ter is released, the lens diaphragm
will automatically return to its au-
tomatic position if the lever is set
on "AUTO".
Turn the shutter speed dial clock-
wise or counter-clockwise
shutter speed desired.
and
1
At slow speeds-slower
- support your camera rigidly or
use a tri~to
of your camer~
If you want to know how great the
depth of field is at a certain aper-
ture, look at the depth-of-field guide.
In the above photograph, the distance
the auto- scale is set at 15 feet ... the lens is
. focused on a subject 15 feet away_
The calibrations on each side of the
distance index correspond to the
diaphragm setting and indicate the
range of in-focus distance for differ-
ent lens apertures_
the lens opening of f/8 is to be used,
speed may be set either before or
after cocking the rapid wind lever.
to the
As you cock the shutter by turning
The shutter
the rapid wind lever, the "cocked"
indicator turns to red showing that
the shutter is cocked.
The indicator window blacks out
as you trip the shutter button. For
use of the X setting on the shutter
speed dial, refer to page 17.
With the shutter speed dial set on
B (bulb), the shutter will stay open
as long as you depress the shutter
button. As you release your finger
from the shutter button, the shutter
closes. When a long exposure is
desired while using the B setting,
attach a shutter release cable with a
locking device to the shutter button_
This will permit a "Time" exposure.
Cautions
2
To protect the shutter mechan-
than 1/30
ism, trip the shutter release' be-
fore putting the camera out of
prevent movement
use for any extended period.
Depth-of-field guide
the range on the distance scale ring
covered within the figure 8 on the
depth-of-field
area in focus at the lens opening.
You will note from the depth-of-field
guide in the photograph that the
range from approximately 10 to 25
feet is in focus_ Note that as the lens
apertures change, the effective depth
of field also changes.
of fields at different apertures and
distances, refer to page 14.
Depth of field is the range between the
For example, if nearest an·d farthest
[
are in focus at different lens apertures_
Shutter
guide indicates the
For the depth
]
distances which
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