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Motor
Drive
One
of
the
most
exciting
new
accessories
for
the
F3 is
the
MD-4 Motor Drive. This amazingly
compact
and
stream-
lined
unit
attaches
to
the
bottom of
the
camera
in
seconds
and
advances
the
film
either
singly
or
in
sequence
form
up
to a
rapid
6·
frames
per
second-making
it
the
fastest
regular
production
motor
drive
on
the
market
today.
Actual controls
have
been
reduced
to
on
ly those
neces
-
sary for
convenient
operation
. In
addition
to
the
electro-
magnetic
trigger
button
(which also
turns
on
the
camera's
meter
when
depressed
halfway),
there
is its
concentric
S-C (SINGLE/CONTINUOUS)
mode
selector, a
battery
check
button
and
LED
indicators, two interlocking
re
-
wind slides for automatic film rewinding,
and
a sub-
tractive frame
counter
which stops
the
motor at
the
desired
number
of frames for use in
cold
weather.
Eight
AA-type
penlight
batteries
fit
into a qUick-release
clip
housed
in
the
base
of
the
motor
drive.
An optional NiCd
battery
pack
is
available
for use in
cold
weather
or
when
you want
the
fastest possible firing
rate
.
Once
you
attach
the MD-4 to
your
camera,
you'
ll
never
want to take it off .
•
FbssibJ
e wi
th
Ni
ed battery
pock
01
1
1125
sec
. or above
with
mirror
Joc
ked
-up.