Pentax 500FTZ Operation Manual - Page 19

Z/PZ-series

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, A Zoom • • WOE ZOOM SELECT ADJUST ( ) LIGHT TEST WHY SYNC. 54 SIB es ) • The proper flash effective distance (approximate value) for the selected aperture will be displayed on the LCD panel when using the lens with lens information contacts and the Z/PZ-series cameras. IL Guide Number (GN) Guide numbers indicate flash intensity. The larger the number, the farther you can reach with your flash. From the guide number, you can easily obtain the proper aperture setting required for an optimum exposure. Aperture [f-number] = GN/flash-to-subject distance [m] Example: GN33/3m = f/11 17

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,
A
Zoom
•
•
WOE
ZOOM
SELECT
ADJUST
LIGHT
(
)
IL
TEST
WHY
SYNC.
54
SIB
es
)
Guide
Number
(GN)
Guide
numbers
indicate
flash
intensity.
The
larger
the
number,
the
farther
you
can
reach
with
your
flash.
From
the
guide
number,
you
can
easily
obtain
the
proper
aperture
setting
required
for
an
optimum
exposure.
Aperture
[f-number]
=
GN/flash-to-subject
distance
[m]
Example:
GN33/3m
=
f/11
•
The
proper
flash
effective
distance
(approximate
value)
for
the
selected
aperture
will
be
displayed
on
the
LCD
panel
when
using
the
lens
with
lens
information
contacts
and
the
Z/PZ-series
cameras.
17