ARRI ALEXA

ARRI ALEXA

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  • 23.8×17.8 mm super 35 sensor
  • 14+ Stops of Dynamic Range
  • Prores 4:4:4 12 bit
  • In-camera ProRes 2K recording
  • Up to 120 fps (NTSC)
  • Up to 60 fps in 2k (NTSC)
  • Iso range 160 – 3200 (EI)
  • In-camera DNxHD HD recording
  • In-camera recording to SxS PRO or SxS PRO+ cards
  • Weight 6.3 (kg)
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Description

Since the moment it was launched, ALEXA has had a profound impact on the industry, redefining the limits of digital motion picture capture with efficient workflows and incredible image quality. Adoption of the system has been widespread and swift, with the cameras now in use on every possible type of production, from episodic TV shows, documentaries and commercials to feature films of all budgets and prestigious, international drama series.

ARRI ALEXA Specifications

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.

Operating Modes

Regular or High Speed mode. High Speed mode requires license purchase. Switching takes approx. 20 seconds.

Frame Rates

16:9
0.75 – 60 fpsAll speeds adjustable with 1/1000 fps precision. To record above 60 fps, the camera needs to be switched to high speed mode. Some limitations based on recording media or recording format apply.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. The lens mount can be upgraded to accept ARRI Full Spectrum Neutral Density (FSND) filters.

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.

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 PL mount: 6.3 Kg/13.9 lbs.
ALEXA body with PL mount, electronic viewfinder, viewfinder cable and handle: 7.7 Kg/16.9 lbs.

Dimensions

ALEXA Classic EV body with PL mount: 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. Camera acts as a web server, displaying the ALEXA Web Remote on web browsers of computers connected to ETHERNET connector. 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

Supported Media

SxS PRO 64 GB (SBP-64A)
SxS PRO+ 64 GB (SBP-64B & SBP-64C)
SxS PRO+ 128 GB (SBP-128B & SBP-128C)

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 Wide Gamut/Log C 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 in-camera 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 (ALEXA Plus BNC Removal Tool, K5.72915.0).

SD Card

For importing and storing ARRI Look Files, camera set up files, frame line files, feature license keys and user pixel masks. Stores frame grabs 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).
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