Camera Type |
35 format film-style digital camera with
an electronic viewfinder, a 16:9 active sensor area, integrated
shoulder arch and receptacles for 15 mm lightweight rods |
Sensor |
35 format ALEV III CMOS sensor with Bayer pattern color filter array. |
Photosites |
16:9 2880 x 1620 used for ARRIRAW 16:9 2880 x 1620 down sampled to 1920 x 1080 for HD-SDI, ProRes HD 16:9 and DNxHD HD 16:9 2868 x 1612 down sampled to 2048 x 1152 for ProRes 2K 16:9
For a drawing with details about the recording areas, surround views and framelines click here |
Operating Modes |
Regular or High Speed mode. High Speed mode requires license purchase. Switching takes approx. 20 seconds. |
Frame Rates |
16:9 ARRIRAW 0.75 - 60 fps ProRes HD 0.75 - 120 fps ProRes 2K 0.75 - 60 fps DNxHD HD 0.75 - 120 fps
All speeds adjustable with 1/1000 fps precision. To record above 60 fps, the camera needs to be switched to high speed mode.
Note: some limitations based on recording media or recording file settings apply.
For a detailed table of frame rates for ALEXA cameras click here
For a detailed table of frame rates for ALEXA cameras with the XR Module Upgrade click here |
Shutter |
Electronic rolling shutter, 5.0º -
358.0º up to 60 fps; 5.0° to 356° above 60 fps. Shutter angle adjustable
with 1/10 degree precision. |
Filters |
Permanent filters in front of the sensor: optical low pass, UV, IR |
Exposure Latitude |
14+ stops for all sensitivity settings from EI 160 to EI 3200, as measured with the ARRI Dynamic Range Test Chart (DRTC). For a graphic of how the exposure latitude shifts at different EIs, click here |
Exposure Index |
Values
behind the exposure index are the number of stops above and below 18%
grey. These values are for Log C. Rec 709 is the same except for 0.3
stops fewer in the low end at EI 160, 200 and 400. |
White Balance |
Presets for 3200 (tungsten), 4300
(fluorescent), 5600 (daylight) and 7000 (daylight cool). Automatic
calculation or manual white balance for 2000 to 11000 Kelvin, adjustable
in 100 K steps |
Color Correction |
While white balance changes the red/blue
hue of the image, color correction changes green/magenta. Adjustable
range from -12 to +12 CC. 1 CC corresponds to 035 Kodak CC values or 1/8
Rosco values. |
Sound Level |
Under 20 db(A) while recording ProRes
4444 16:9 HD @ 24 fps and ≤ +30° Celsius (≤ +86° Fahrenheit) with lens
attached and fan mode set to 'Regular', measured 1 m/3 feet in front of
the lens. Silent operation at higher temperatures possible with fan mode
set to 'Rec low'. |
Power In |
Three possible inputs: BAT connector,
optional battery adapter back or optional battery adapter top. All
inputs accept 10.5 to 34 V DC. Approx. 85 W power draw for camera and
EVF-1 in typical use recording ProRes at 24 fps to an SxS PRO card at
room temperature, without accessories. Initial power draw during power
up is higher. |
Power Out |
12 V connector: limited to 12 V, up to
2.2 A. RS, EXT and ETHERNET: input below 24 V is regulated up to 24 V;
above 24 V: input voltage = output voltage. RS and EXT connectors
combined are limited to 2.2 A. ETHERNET is limited to 1.2 A. Maximum
power draw is also limited by the power source. |
Weight |
ALEXA body with SxS Module: 6.3 Kg/13.8 lbs. ALEXA body with SxS Module, electronic viewfinder and handle: 7.7 Kg/16.9 lbs. |
Dimensions |
Length: 332 mm/12.95”, width: 153 mm/6.02”, height: 158 mm/6.22”. Dimensional drawings available at www.arri.com/alexa/downloads |
Environmental |
-20° C to +45° C (-4° F to +113° F) @
95% humidity max, non-condensing. Splash and dust proof through sealed
electronics. System cooling through radiator/single fan. |
Lens Mount |
54 mm stainless steel PL mount, Super 35 centered. 52.00 mm nominal flange focal depth. |
Viewfinder |
Low latency (≤1 frame delay) electronic
color viewfinder ARRI EVF-1 with 1280 x 784 F-LCOS micro display (image:
1280 x 720, status bars: 1280 x 32 above and 1280 x 32 below image) and
ARRI LED illumination, both temperature controlled. Image can be
flipped for use of viewfinder on camera left or right. Viewfinder
Mounting Bracket allows movement of viewfinder forward/backwards,
left/right, up/down, 360 degree rotation and placement on camera left or
right. EVF-1 controls: viewfinder and basic camera settings, ZOOM
button (2.25x magnification 'pixel to pixel'), EXP button (false color
exposure check) and jog wheel. |
Assistive Displays |
For EVF-1 and MON OUT: preset and custom
frame lines, user rectangles, surround view, 180º image rotation,
camera status, false color exposure check, peaking focus check, compare
stored image with live image, RETURN IN video and optional anamorphic
de-squeeze (license key required). For MON OUT additionally: Reel &
clip number.
For a graphic of which false color indicates which exposure level, click here |
Control |
Camera right: Main user interface with a
3” transflective 400 x 240 pixel LCD color screen, illuminated buttons,
button lock and jog wheel. Camera left: Operator interface with
illuminated buttons and button lock. Optional accessory Remote Control
Unit RCU-4 for cabled remote control via camera ETHERNET connector.
Optional accessory Wireless Compact Unit WCU-4 for wireless remote
control (UMC-3A or UMC-4 required). |
In-camera Recording |
QuickTime/ProRes or MXF/DNxHD recording
onto one or two (Dual Recording) SxS PRO or SxS PRO+ cards. All formats
include embedded audio, timecode and metadata.
For more details, click here |
Recording Outputs |
2x 1.5G or 3G REC OUT BNC connectors for
ARRIRAW T-Link or HD-SDI video. Both with embedded audio, timecode,
metadata and recording flag. ARRIRAW: 2880 x 1620 (16:9),
uncompressed, unencrypted 12 bit log without white balance or exposure
index processing applied. Requires an ARRIRAW T-Link certified recorder. HD-SDI
video: uncompressed 1920 x 1080 (16:9) 4:4:4 RGB or 4:2:2 YCbCr at
23.976, 24, 25, 29.97, 30, 50, 59.94, or 60 fps. Recording other speeds
requires a recorder with Variflag support. Legal or extended range
signal mapping.
For a detailed table of REC OUT options click here For a detailed table of 'REC OUT = Clean MON OUT' behavior click here |
Monitor Output |
1x MON OUT BNC connector for
uncompressed 1.5 G HD-SDI video: 1920 x 1080 (16:9), 4:2:2 YCbCr; legal
range HD video at 23.976, 24, 25, 29.97, or 30 fps. Embedded audio, time
code, metadata and recording flag. |
Image Processing |
16 bit linear internal image processing
in full ALEXA native color space. Target output color spaces for ProRes,
DNxHD, REC OUT and MON OUT: Log C or Rec 709. For Rec 709, a customized
look can be applied during record and playback with ARRI Look Files.
Optional horizontal image mirroring. |
Synchronization |
Master/Slave mode for precision sync of
settings, sensor, processing, HD-SDI outputs and QuickTime/ProRes or
MXF/DNxHD recording for 3D applications. PHASE user button for shifting
camera phase to move phase artifacts out of frame, i.e. when shooting a
CRT monitor or rear screen projector (works in Rec Run TC mode). |
Playback |
Playback of ProRes or DNxHD from SxS PRO
or SxS PRO+ cards visible on EVF-1, MON OUT and REC OUT. Playback audio
available over headphone jack and embedded in the MON OUT and REC OUT
signal. |
Audio |
1x XLR 5 pin AUDIO IN for 2 channel,
line level, balanced audio. 24 bit/48 kHz A/D conversion. Uncompressed
PCM audio recording to ARRIRAW, ProRes, DNxHD and embedded in all HD-SDI
outputs. Only available with same project/sensor speed at 23.976, 24,
25, 29.97 and 30 fps. Max of 2.5 dBm output from AUDIO OUT headphones
connector. |
Connectors |
2x slots for SxS PRO cards (SxS) 2x BNC recording out HD-SDI, 1.5G/3G (REC OUT 1 and REC OUT 2) 1x BNC monitoring out HD-SDI, 1.5G (MON OUT) 1x XLR 5-pin analog audio in (AUDIO IN) 1x BNC return video in HD-SDI, 1.5G (RET/SYNC IN) 1x LEMO 16-pin external accessory interface (EXT) 1x Fischer 2-pin 24 V power in (BAT) 2x Fischer 3-pin 24 V remote start and accessory power out (RS) 1x LEMO 2-pin 12 V accessory power out (12 V) 1x LEMO 5-pin timecode in/out (TC) 1x TRS 3.5 mm headphone mini stereo jack (AUDIO OUT) 1x custom LEMO 16-pin electronic viewfinder (EVF) 1x custom LEMO 10-pin Ethernet with 24 V power (ETHERNET) BNC
connectors designed for fast exchange without camera disassembly have
been used for ALEXA since approximately mid 2012. These connectors
require a special tool. |
SD Card |
For importing and storing ARRI Look
Files, camera set up files, frame line files, feature license keys and
user pixel masks. Stores captured stills from the REC OUT image path in
ARRIRAW (.ari, 12 bit), TIFF (.tif, 16 bit), DPX (.dpx, 10 bit) or JPEG
(.jpg, 8 bit) format (1). Stores log files. Also used for installing
Software Update Packets (SUPs). |
Upgrades |
The Storage Interface Module (SxS
Module) can be exchanged for future storage modules (i.e. XR Module).
The Electronics Interface Module can be exchanged for future control
electronics (i.e. Plus upgrade). Exchangeable Lens Mount (ELM) allows
other lenses beyond PL mount lenses to be used. Simple camera software
updates via free-of-charge Software Update Packets (SUPs) and payable
license keys – Anamorphic De-squeeze, High Speed and DNxHD. |
Software Tools (apps) |
ARRIRAW Converter (ARC) ARRI Look Creator (ALC) ARRI Meta Extract |
Software Tools (online) |
ALEXA Camera Simulator ALEXA Frame Line Composer (AFC) LUT Generator ALEXA Pocket Guide WebApp
|
|
(1) When REC OUT is set to 'ARRIRAW',
frame grabs are only possible in the .ari format. Frame grabs are not
possible during High Speed, 16:9 2K or when the option 'REC OUT = MON
OUT Clone' is chosen. |
|
Note:Technical data based on Software Update Packet SUP 10.0.1 (ALEXA Classic). All data subject to change without notice. |