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ALEXA SXT Plus 143
3D lens sync
When two ALEXA SXT Plus cameras are set to Sensor sync EXT master and EXT
slave, the slave camera will switch off its radio module and receive motor control
commands from the master camera over the EXT connection.
NOTICE
•
Matching of the master and slave cameras' lenses in terms of focus, iris and
zoom ring positions depends on the mechanical accuracy of the lenses. Make
sure the lenses in use are matched as closely as possible. Use only lenses
of the same focus classification to minimize positional errors. Deviating focus
positions of non-matching lenses cannot be compensated.
•
At higher focus distances, even a very small position error of the lens ring
results in a great difference of indicated focus values. Therefore, even a pair of
matching lenses in a 3D lens sync setup may show different focus values.
Lens Data Encoder LDE-1
The LDE-1 generates lens data in situations when an ALEXA Plus or ALEXA Studio
model (or an UMC-4) is being used without an LDS lens or an ARRI lens motor.
Thus the LDE-1 extends the abilities of the ARRI Lens Data System to all lenses
and cameras setups. The LDE-1 is compatible with ALEXA SXT Plus and ALEXA
SXT Studio models or with the ALEXA SXT EV models when used with the Universal
Motor Controller UMC-4. The LDE-1 contains an encoder that delivers lens data to
the camera and can be used in parallel with a manual follow focus unit or a third-party
wireless lens control system.
15.2.3 Hand Units
For detailed information of the hand units, please refer to the device's own manuals.
Wireless Compact Unit WCU-4
The WCU-4 is an all-inclusive and yet affordable hand unit offering up to 3-axis lens
control. It includes a newly designed, super-smooth focus knob with adjustable friction
and backlit, optionally pre-marked focus rings that are well readable in the dark
without distracting performers. The whole unit is completely splash proof for ARRI-
typical reliability. The slider has its scale on the 3” display, providing clearly readable
T-stop numbers and optional on-screen markings. If preferred, the slider can be also
set to show zoom scales. With the additional ALEXA Remote license, the WCU-4
shows extended camera status information and allows to change camera parameters
from the remote unit.
Wireless Compact Unit WCU-3
The WCU-3 is a compact hand unit featuring a radio system to connect to the camera
wirelessly. It has two LCS ports for connecting the device to the camera via cable and
to attach a ZMU-3. A wheel and a slider can be used to control focus and iris axes.
Zoom axis can be controlled by attaching a ZMU-3 at an LCS port.
The WCU-3 also has a display where it shows current fps, shutter angle, exposure
index and white balance of the camera.
Wireless Main Unit WMU-3
The WMU-3 is a radio system for wireless connection to the camera. Both WFU-3 and
WZU-3 can be attached to the WMU-3.
Wireless Focus Unit WFU-3
The WFU-3 has a knob and a slider that can be used to control focus and iris axes. It
connects to the camera through a WMU-3 or a WHA-3.
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