User`s guide

ARRICAM Accessories Quick Guide 01/2004, Page 11 of 24
Manual speed/iris ramps with non-LDS lenses
These can be done by means of the Iris Control Unit (ICU) and an ARRICAM ICU Cable (KC 72-S (1m/3ft);
yellow to CAC, white to ICU) in combination with a CLM-1 motor. If using a CLM-2 motor, a Lens Data Box is
also necessary.
• The COMPENSATION switch on the Speed Control Box has to be set to OFF.
The Wireless Remote Control (WRC-1), which needs software V1.08 or later installed, can be used instead of
the Manual Control Box control. A CLM-1 or CLM-2 motor has to be connected to the Lens Data Box.
Manual shutter/iris ramps with LDS lenses
During a shutter/iris ramp the frame rate stays constant. The shutter angle changes, and the lens’ iris
compensates to maintain a constant film exposure. The result is a change in the depth of field and in the
amount of motion blur. To do this the Lens Data Box, an LDS Lens and a CLM motor are needed.
In performing a shutter ramp with iris compensation, the iris can only be set with the OPEN/CLOSE buttons on
the Speed Control Box – the Wireless Focus Unit iris is overridden.
• On the Manual Control Box set the MANUAL CONTROL switch to . The MIN position of the hand-
wheel is 11.2°, and the MAX position is 180°.
• On the Speed Control Box set the SPEED CONTROL switch to ON.
Note: Now the RAMP button and TIME selector on the Speed Control Box have no effect on the ramp, since the
Manual Control Box controls ramping.
• On the Speed Control Box set the COMPENSATION switch to IRIS.
• The CALIBRATION LED on the Speed Control Box now flashes yellow if the motor is not calibrated. In that
case, press the CAL button on the Speed Control Box to calibrate the iris motor.
• Set the ramp’s starting shutter angle with the Manual Control Box handwheel.
• Once the COMPENSATION LED is green, start the camera. Turn the Manual Control Box handwheel to
perform the ramp.
Note: If the COMPENSATION LED glows red, the selected iris position is too close to one of the limits of the iris
scale to be able to compensate for the shutter change. The mirror shutter can compensate for a range of 4 T-stops,
so in pairing e.g. T 4 with a 45° shutter angle, the shutter/iris ramp will be limited by T 2/11.2° and T 8/180°.
Change either the iris with the OPEN/CLOSE buttons on the Speed Control Box or the shutter opening with the
handwheel on the Manual Control Box.
Manual shutter/iris ramps with non-LDS lenses
A manual shutter/iris ramp with non-LDS lenses can only be achieved by means of the Wireless Remote
Control (WRC-1). A CLM-1 or CLM-2 motor has to be connected to the Lens Data Box. The Speed Control
Box is not necessary.
Combined use of the Manual & Speed Control Boxes