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Pentax Program Plus User Manual

Pentax Program Plus
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The
shutter-speed
and
aperture
combination
In
the
Programmed
AE
mode
is
shown
in
the
chart.
The
red
line
represents
the
variation
of
shutter-
speed
and
aperture
combination
with
an
f/1.4
lens.
Note
that
only
the
shutter-speed
slows
down
after
the
lens
aperture
reaches
Its
limit
of
f/1.4
in
combination
with
a
speed
of
approx.
1/30
sec.
When
you
use
a
lens
with
a
different
maximum
aperture,
the
exposure
program
varies
the
aperture
and
the
shutter-speed
in
combination
until
reaching
the
maximum
aperture
of
your
lens.
For
example,
with
an
f/2.8
lens
the
program
varies
the
combination
as
shown
by
the
red
dotted
line.
Note
that
only
the
shutter-speed
changes
after
the
maximum
aperture
is
reached.
The
fine
red
line
in
the
Programmed
AE
diagram
indicates
the
Automatic
Exposure
control
range
for
a
lens
with
minimum
aperture
smaller
than
f/22,
or
for
a
film
with
ISO
speed
other
than
100.
The
fine
red-dotted
line
indicates
the
range
for
a
lens
with
maximum
aperture
smaller
than
f/1.4,
or
for
a
film
with
ISO
speed
other
than
100.
Meter
coupling
range
and
Shutter/Aperture
coupling
range
The
meter
coupling
range
means
the
range
of
subject
luminance
within
which
the
built-in
exposure-meter
works
to
control
exposure.
The
shutter/aperture
coupling
range
is
that
part
of
the
meter
coupling
range
within
which
shutter-speed
and
aperture
value
can
be
combined
for
proper
exposure
control.
When
you
use
a
50mm
f/1.4
normal
lens
and
an
ISO
100
film,
the
meter
coupling
range
is
from
EV
1
(f/1.4-1
sec.
or
f/2-2
sec.)
to
EV
18
(f/16-1/1000
sec.
or
f/22-1/500
sec.).
The
range
varies
according
to
film
speed
(ISO),
The
variation
of
the
meter
coupling
range
is
shown
by
slanting
lines
which
shift
with
ISO
ratings.
The
frame
in
the
center
shows
the
meter
and
shutter/aperture
control
coupling
range.
EV
(Exposure
Value)
EV
represents
a
combination
of
the
shutter-speed
and
the
lens
aperture
which
Is
determined
by
the
film
speed
(ISO)
and
the
brightness
of
the
subject.
43
•

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Pentax Program Plus Specifications

General IconGeneral
Lens mountPentax K mount
ISO range25 - 1600
Film advanceManual
Camera typeSLR
Exposure modesProgram, Manual
MeteringTTL, center-weighted
FlashHot shoe

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