10
Extended Capacity Balance
The spring counterbalancing mechanism comprises four springs operating
against a three-dimensional cam connected to the camera mounting platform.
The balance mechanism is adjusted by the counterbalance crank on the lower
left rear of the head. The knob has a retractable handle and the 'push in and turn'
action uses a clutch to prevent inadvertent damage to the balance mechanism.
Adjustments should only be made with the platform in the horizontal position.
Maximum and minimum payloads that can be balanced, and tilt ranges, are
dependent on the weight of the camera and accessories and on the center of
gravity © of G) height. The graph below shows the range of loads and C of G
heights that can be maintained in balance. At the lower end of the weight range
the full ±90 degree tilt range is available while at the maximum load the tilt range
is reduced to ±60 degrees.
Digital Display
The digital display indicates the setting of the balance mechanism on a scale of
0-182%. Press the display actuator button to illuminate the display and adjust the
counterbalance crank. At settings above 100% the EX indicator will turn on to
alert you to the reduced tilt range. The display turns off automatically
approximately 15 seconds after you stop adjusting. The display dims in dark
surroundings.
Ultra Smooth Fluid Drag
Both the pan and tilt mechanisms incorporate OConnor's ultra smooth fluid drag
to ensure smooth movement. The pan and tilt drag adjustment knobs are on the
right side of the head and are continuously adjustable from 0 to 9.
Pan And Tilt Locks
Friction locks on each axis allow the head to be locked at any desired position.
The pan and tilt lock levers are on the left-side of the head.
20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320
9
18 27 36 45 54 64 73 82 90 100 109 118 127 136 145
12
10
8
6
4
2
51
102
152
203
254
305
0
CAMERA WEIGHT
in mm
lbs
kg
min. 90º 80º 70º 60º
COUNTERBALANCE
± º
EX MODE
120EX
C
A
M
E
R
A
C
E
N
T
E
R
O
F
G
R
A
V
IT
Y
A
B
O
V
E
P
L
A
T
F
O
R
M
±90° MODE
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com
OConnor Engineering
