ARRI ALEXA Series User Manual

Studio Camera Controls 201
MIRROR PARK buttons VIEW and GATE
The camera left side Operator Controls have two additional function
buttons labelled VIEW and GATE. These buttons control the parking
position of the mirror shutter.
A spinning mirror shutter can be stopped by pressing either of the two
buttons. Pressing the VIEW button will park the mirror in the optical
path, enabling a live preview in the optical viewfinder.
Pressing the GATE button will stop the mirror shutter out of the optical
path, enabling a live preview on the MON OUT and the REC OUT, and
the EVF in case it is mounted to the camera. Each button is
accompanied by a blue LED that lights when the mirror is parked in the
respective position. When the mirror shutter is running, both of the
LEDs will be active.
Pressing the GATE button while the mirror is parked in the VIEW
position will move the mirror shutter by 180.0° degrees into the GATE
position.
Pressing the VIEW button while the mirror is parked in the GATE
position will move the mirror shutter by 180.0° degrees into the VIEW
position.
To restart the mirror shutter, press both VIEW and GATE
simultaneously.
Note: After booting the camera, the mirror shutter is parked in the GATE
position for safety reasons.
When stopping, the mirror shutter always opens up the electronic
sector gate to 180.0°, and closes down when it is restarted.
A live image on EVF, MON OUT and REC OUT is available when the
mirror shutter is spinning or parked in the GATE position. A parked
mirror shutter will automatically start spinning when recording is
started.
When the mirror shutter is switched off, it is parked in the GATE
position.
Note: For safety reasons, it is required to power down the camera before
performing a "gate check". Do not check or clean the sensor cover glass while
the camera is powerded up and the mirror is parked in the GATE position!
Frame rate and shutter angle with mirror shutter on
When the mirror shutter is switched on, the sensor frame rate is limited
to 60 fps in 16:9 and 48 fps in 4:3.

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)