ARRI ALEXA Series User Manual

Plus Camera Controls 179
14 ALEXA Plus 4:3
The ALEXA Plus 4:3 is identical to an ALEXA Plus except for its 4:3
active sensor area. This makes the camera the ideal companion camera
to an ALEXA Studio.
Licenses
The ALEXA Plus 4:3 includes a bundle license, which enables DNxHD,
High Speed recording and anamorphic desqueeze. The license is pre-
installed on the camera and cannot be deleted.
Note: Do not downgrade the camera to a software version before SUP 6.1.
4:3 mode
In 4:3 mode, the camera captures images from a vertically extended
sensor area. The used area is 23.76 x 17.82mm in size, which translates
to 2880 x 2160 sensor photo sites.
Note: The sensors of standard ALEXA and ALEXA Plus cameras can only be
operated in 16:9 mode.
To change the sensor mode:
1. In the System menu, select Sensor.
2. Select Sensor mode. The current sensor mode is indicated on the
top line on the SENSOR screen.
3. Press the jogwheel to select 16:9 or 4:3 sensor mode.
4. Press the LOAD buttons simultaneously to load the new sensor
mode.
Loading the new sensor mode takes approximately 30 seconds
including a mandatory camera reboot. A progress bar indicates the
sensor mode loading progress.

ARRI ALEXA Series Specifications

General

Dynamic Range	14+ stops
Resolution	4.5K (ALEXA LF), 6.5K (ALEXA 65)
Recording Formats	ARRIRAW, Apple ProRes
Lens Mount	PL mount
Viewfinder	Optional EVF (Electronic Viewfinder)
Sensor Size	Super 35 (most models), Large Format (ALEXA LF, ALEXA 65)
ISO Range	EI 160 - EI 3200 (Base ISO 800)