Pentax PZ-1p PZ-1p Manual - Page 93

Pentax PZ-1p Manual

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* When the Hyper Programmed AE mode is changed to the Aperture-Priority AE mode with the Ay direct dial, any aperture can be set within the shutter speed range depending on the focal length of the lens mounted on the camera. If the automatic shift of shutter speed is canceled using a Pentax function No.5 selection 1, any available aperture between the minimum to the maximum can be selected. See page 101. Hyper Manual Mode * When using the built-in flash in the Hyper-Manual mode, any combination usage of the aperture and the shutter speed slower than 1/250 sec. can be selected. * If the Pentax function No.7 selection 1 is set (See page 102), a shutter speed changes to slower which can be used as a slow-shutter-speed flash synco mode. Calculating Flash Effective Distance According to the Selected Aperture Maximum flash distance = GN ÷ Selected aperture Minimum flash distance = Maximum flash distance ÷ 4.9 When the distance to the subject is less than 0.7m, flash cannot be used. If the flash is used within that distance, it causes vignetting the picture corners, light is distributed unevenly and the picture may be overexposured. The value 4.9 used in the formula above was obtained from the builtin flash. Guide Number is referred to as GN. Calculating the aperture according to the camera-tosubject distance If the calculated aperture value is the one other than an f-stop on the aperture ring, for instance f/3, choose the next smallest aperture ring (f2.8 in this case). The guide numbers depend upon the film speed used as shown below. ISO 25 -> GN 7 ISO 200 --. GN 20 ISO 50 -= GN 10 ISO 400 --> GN 28 ISO 100 --+ GN 14 z C) If an ISO 100 film is used at an aperture of f/3.5, the O flash effective distance is obtained as follows: m GN14 f3.5=4 O 4 4.9= Approx.0.8m Thus, flash effective distance range is from approx. 0.8m to 4m.

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*
When
the
Hyper
Programmed
AE
mode
is
changed
to
the
Aperture
-Priority
AE
mode
with
the
Ay
direct
dial,
any
aperture
can
be
set
within
the
shutter
speed
range
depending
on
the
focal
length
of
the
lens
mounted
on
the
camera.
If
the
automatic
shift
of
shutter
speed
is
canceled
using
a
Pentax
function
No.5
selection
1,
any
available
aperture
between
the
minimum
to
the
maximum
can
be
selected.
See
page
101.
Hyper
Manual
Mode
*
When
using
the
built-in
flash
in
the
Hyper
-Manual
mode,
any
combination
usage
of
the
aperture
and
the
shutter
speed
slower
than
1/250
sec.
can
be
se-
lected.
*
If
the
Pentax
function
No.7
selection
1
is
set
(See
page
102),
a
shutter
speed
changes
to
slower
which
can
be
used
as
a
slow
-shutter
-speed
flash
synco
mode.
Calculating
Flash
Effective
Distance
According
to
the
Selected
Aperture
Maximum
flash
distance
=
GN
÷
Selected
aperture
Minimum
flash
distance
=
Maximum
flash
distance
÷
4.9
When
the
distance
to
the
subject
is
less
than
0.7m,
flash
cannot
be
used.
If
the
flash
is
used
within
that
distance,
it
causes
vignetting
the
picture
corners,
light
is
distributed
unevenly
and
the
picture
may
be
overexposured.
The
value
4.9
used
in
the
formula
above
was
obtained
from
the
built-
in
flash.
Guide
Number
is
referred
to
as
GN.
Calculating
the
aperture
according
to
the
camera
-to
-
subject
distance
If
the
calculated
aperture
value
is
the
one
other
than
an
f-stop
on
the
aperture
ring,
for
instance
f/3,
choose
the
next
smallest
aperture
ring
(f2.8
in
this
case).
The
guide
numbers
depend
upon
the
film
speed
used
as
shown
below.
ISO
25
->
GN
7
ISO
200
--.
GN
20
ISO
50
-=
GN
10
ISO
400
-->
GN
28
ISO
100
--+
GN
14
z
C)
If
an
ISO
100
film
is
used
at
an
aperture
of
f/3.5,
the
O
flash
effective
distance
is
obtained
as
follows:
GN14
f3.5=4
4
4.9=
Approx.0.8m
Thus,
flash
effective
distance
range
is
from
approx.
0.8m
to
4m.
m
O