User`s guide

ARRICAM Accessories Quick Guide 01/2004, Page 18 of 24
Focus Tracking
It is now possible to use a distance measuring device (such as the Cinematography Electronics Cine Tape
Measure) to display a pointer on the LDD-FP indicating the distance to the subject. This can be used simply for
information purposes or, by pressing and holding the FOCUS button on the WHA-3, the motor on the focus
axis will drive the focus ring to automatically track the subject. There is also a new line on the focus scale of
the LDD-FP indicating the position of the focus handwheel of the Wireless Focus Unit. By matching these two
indicators, the ‘handover’ from manual to automatic focus will be smooth.
Operation
In the LDD-FP main menu the entry called FOCUS TRACKING turns on and off the function of the focus button,
which is on the side of the WHA-3. With this option OFF, the Tape Measure Mark is still displayed but the
Focus Motor will not track it.
Note: The WHA-3 is identical to the WHA-2 with the exception of the newly added focus button.
The Slow, Medium and Fast options determine how fast the focus motor responds to the changing distance
information.
When Handwheel OFF is checked, the hand wheel of the Wireless Focus Unit is disabled. When the focus
button is pushed, the focus motor will track the measured distance. When the button is released the focus motor
will stop and remain where it is until the focus button is pushed again.
Compatibility
The following items are needed for focus tracking: Studio or Lite with Lens Data Box or 435 Advanced with
FEM-2, CLM-1 or CLM-2 lens motor, LDS lens, LDD-FP, Cine Tape Measure (or other distance measuring device
with industry standard output), WHA-3, CAC to CTM cable (0.7m/2ft).
Tape Measure Mark
Focus Handwheel Mark