Pentax 645 645 Manual - Page 53

Using, Ordinary, Flash, Units

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USING ORDINARY FLASH UNITS Shutter speed ranges for flash synchronization Shutter speed Electronic flash units Flash bulbs 1/1000 1/500 1/250 1/125 1/60 1/30 1/15 1/8 1/2 1 - 15 B Electronic flash unit MF flash bulbs M and FP flash bulbs Electronic flash units When using a clip-on type flash unit equipped with a hot shoe bracket, attach the same directly onto the hot shoe of your Pentax 645. Should a cord be required for flash/camera connection, utilize a synch cord to fit into the camera's X-synch socket. As indicated in the above table, flash synchronizatin is possible at the shutter speeds from 1/60 sec. through 15 secs., and B. It is recommended that other makes of flash units, particularly dedicated types for other cameras, or specific purpose types not be utilized; doing so may cause malfunctions and/or damage to the electronic exposure control system of the Pentax 645. Flash bulbs By connecting a synch cord to the X-synch socket, the use of an independent flash gun is possible. With the MF type flash bulbs, select any of the shutter speeds from 1/30 sec. through 15 secs. including the B position; the M/FP type will permit flash synchronization within the range of 1/15 sec. to 15 secs. and B. For detailed use of flash units, flash guns or flash bulbs, refer to the operational instructions on the respective units. 51

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USING
ORDINARY
FLASH
UNITS
Shutter
speed
ranges
for
flash
synchronization
Shutter
speed
1/1000
1/500
1/250
1/125
1/60
1/30
1/15
1/8
1
/2
1
-
15
B
-
Electronic
flash
units
Electronic
flash
unit
Flash
bulbs
MF
flash
bulbs
M
and
FP
flash
bulbs
Electronic
flash
units
When
using
a
clip
-on
type
flash
unit
equipped
with
a
hot
shoe
bracket,
attach
the
same
directly
onto
the
hot
shoe
of
your
Pentax
645.
Should
a
cord
be
required
for
flash/camera
connection,
utilize
a
synch
cord
to
fit
into
the
camera's
X
-synch
socket.
As
indicated
in
the
above
table,
flash
synchronizatin
is
possible
at
the
shutter
speeds
from
1/60
sec.
through
15
secs.,
and
B.
It
is
recommended
that
other
makes
of
flash
units,
particularly
dedicated
types
for
other
cameras,
or
specific
purpose
types
not
be
utilized;
doing
so
may
cause
malfunctions
and/or
damage
to
the
electronic
exposure
control
system
of
the
Pentax
645.
Flash
bulbs
By
connecting
a
synch
cord
to
the
X
-synch
socket,
the
use
of
an
independent
flash
gun
is
possible.
With
the
MF
type
flash
bulbs,
select
any
of
the
shutter
speeds
from
1/30
sec.
through
15
secs.
including
the
B
position;
the
M/FP
type
will
permit
flash
synchronization
within
the
range
of
1/15
sec.
to
15
secs.
and
B.
For
detailed
use
of
flash
units,
flash
guns
or
flash
bulbs,
refer
to
the
operational
instructions
on
the
respective
units.
51