ALEXA / ALEXA Plus Technical Data
| Camera Type | 35 format film-style digital camera with electronic viewfinder, integrated shoulder arch, built-in support for the ARRI Wireless Remote System (WRS), cmotion cvolution lens control system and ARRI Lens Data System (LDS). |
| Sensor | 35 format ALEV III CMOS with Dual Gain Architecture (DGA) and Bayer pattern color filter array. |
| Photosites | 2880 x 1620 down sampled to 1920 x 1080 for HD video and ProRes. |
| Operating Modes | Regular or High Speed mode. High Speed mode requires license purchase. Switching takes approximately 40 seconds. |
| Frame Rates | ProRes 422 (Proxy), 422 (LT), 422 and 422 (HQ): 0.75 – 60 fps ProRes 422 (Proxy), 422 (LT), 422 and 422 (HQ) with High Speed license: 0.75 – 120 fps Prores 4444 with 32 GB SxS PRO cards: 0.75 – 40 fps ProRes 4444 with 64 GB SxS PRO cards, SUP 5.0 or later: 0.75 – 60 fps DNxHD 145 and 220x: 0.75 – 60 fps DNxHD 145 and 220x with High Speed license: 0.75 – 120 fps HD-SDI: 0.75 – 60 fps
All speeds adjustable with 1/1000 fps precision. |
| Shutter | Electronic rolling shutter, 0.75 – 60 fps: 5.0º – 358.0º, 60 – 120 fps: 356º. Shutter angle setting precision: 1/10 degree. |
| Exposure Latitude | 14 stops for all sensitivity settings from EI 160 to EI 3200, as measured with the ARRI Dynamic Range Test Chart (DRTC). |
| Exposure Index | EI 160 (+5.0 / -9.0), EI 200 (+5.3 / -8.7), EI 400 (+6.3 / -7.7), EI 800 (+7.4 / -6.6), EI 1600 (+8.4 / -5.6), EI3200 (+9.4 / -4.6) Values behind the exposure index are the number of stops above and below 18% grey. These values are for Log C. Rec 709 and DCI P3 are the same except for 0.5 stops fewer in the low end at EI 160, 0.4 stops fewer in the low end at EI 200 and 0.2 stops fewer in the low end at EI 400. |
| White Balance | Separate white balance (red/blue) and color correction (green/magenta) adjustment through Auto or manual setting. Red/blue: 2000 to 11000 Kelvin, adjustable in 100 K steps, with presets of 3200 (tungsten), 4300 (fluorescent), 5600 (daylight) and 7000 (daylight cool). Green/magenta: -8 to +8 color correction (CC), 1 CC = 035 Kodak CC values or 1/8 Rosco values. |
| Sound Level | Under 20 db(A) @ 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 inputs: BAT connector, battery adapter back and battery adapter top. All accept 10.5 to 34 V DC. 85 W power draw for camera and EVF-1 in typical use recording 24 fps to SxS PRO cards, without accessories. |
| Power Out | 12V connector: limited to 12 V, up to 2.2A. RS, EXT and ETHERNET: input below 24V is regulated up to 24V, above 24V: input = output voltage. Both RS and EXT connectors combined: up to 2.2A. ETHERNET: up to 1.2A. Maximum power draw is also limited by the power source. |
| Weight | ALEXA camera body + SxS Module: 6.3 Kg/13.8 lb ALEXA Plus camera body + SxS Module: 7.0 Kg/15.4 lb ALEXA Plus camera body + SxS Module + EVF-1 + Viewfinder Mounting Bracket VMB-2 + viewfinder cable + Center Camera Handle CCH-1: 8.4 Kg/18.5 lb |
| Dimensions | ALEXA: Length: 332 mm/12.95”, width: 153 mm/6.02”, height: 158 mm/6.22 ALEXA Plus: Length: 332 mm/12.95, width: 175 mm/6.89, 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 | ARRI Exchangeable Lens Mount (ELM); ships with Lens Adapter PL Mount w/o LDS, 54 mm stainless steel PL mount, Super 35 centered |
| Flange Focal Depth | 52.00 mm nominal |
| Control | Camera right: main user interface with 3” transflective 400 x 240 pixel LCD color screen, illuminated buttons, button lock and jog wheel. Camera left: operator interface with illuminated buttons, button lock and card swap button. |
| In-camera Recording |
Records Apple QuickTime/ProRes files or MXF/DNxHD files onto one or two (Dual Recording) SxS PRO cards. All codecs record legal range video with embedded audio, timecode and metadata.
Codec: QuickTime/ProRes 4444
Codec: QuickTime/ProRes 422 (HQ)
Codec: QuickTime/ProRes 422
Codec: QuickTime/ProRes 422 (LT)
Codec: QuickTime/ProRes 422 (Proxy)
Codec: MXF/DNxHD 175x/185x/220x Compression: 8:1 Bit Rate in Mb/s at 30 fps: 220 Bit Depth: 10 Color Coding: 4:2:2 YCbCr Recording time in hrs:min (2): 0:39 Application: High quality television applications requiring color correction.
Codec: MXF/DNxHD 115/120/145 Compression: 12:1 Bit Rate in Mb/s at 30 fps: 147 Bit Depth: 8 Color Coding: 4:2:2 YCbCr Recording time in hrs:min (2): 0:59 Application: Basic television applications if images do not require adjustments in postproduction.
(1) Compression rate calculated based on 10bit full HD RGB with 1.8Gbit/s |
| Recording Outputs | 2x 1.5G or 3G REC OUT BNC connectors for HD-SDI video. Both with embedded audio, timecode, metadata and optional recording flag. |
| HD-SDI video | uncompressed 1920 x 1080 4:4:4 RGB or 4:2:2 YCbCr; both legal or extended range. Recording frame rates other than HD standard (23.976, 24, 25, 29.97, 30, 50, 59.94, 60 fps) requires a recorder with Variflag support. |
| Monitor Output | 1x MON OUT BNC connector for uncompressed 1.5 G HD-SDI video: 1920 x 1080, 4:2:2 YCbCr; legal range. |
| Image Processing | 16 bit linear internal image processing. Target color spaces for SxS, REC OUT and MON OUT: Log C, 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 SxS recording for 3D applications. |
| Playback | QuickTime/ProRes and MXF/DNxHD clips can be played back from SxS PRO cards to the EVF-1, MON OUT and REC OUT. Playback audio is available embedded in the MON OUT and REC OUT signals and on the headphones jack. |
| Audio | 1x XLR 5 pin AUDIO IN connector for 2 channel, line level balanced audio input, 24 bit/48 kHz A/D conversion, works at 23.976, 24, 25, 29.97 and 30 fps. Uncompressed audio is recorded into the QuickTime/ProRes file or MXF/DNxHD file and embedded in all HD-SDI outputs, including ARRIRAW T-Link. Max of 2.5 dBm output from AUDIO OUT headphones connector. |
| Connectors | Slots for SxS PRO cards (SxS), Camera body 2x BNC recording out HD-SDI, 1.5G/3G (REC OUT 1 and REC OUT 2), Camera body 1x BNC monitoring out HD-SDI 1.5G (MON OUT), Camera body 1x XLR 5 pin audio in (AUDIO IN), Camera body 1x BNC return signal HD-SDI, 1.5G (RET/SYNC IN), Camera body 1x LEMO 16 pin external accessories(EXT), Camera body 1x Fischer 2 pin 24 V power in (BAT), Camera body 2x Fischer 3 pin 24 V remote start and accessory power out (RS), Camera body 1x LEMO 2 pin 12 V accessory power out (12 V), Camera body 1x LEMO 5 pin timecode in/out (TC), Camera body 1x TRS 3.5 mm headphone mini stereo jack out (AUDIO OUT), Camera body 2x LEMO 10 pin Ethernet with 24 V power (ETHERNET), Camera body 1x LEMO SMPTE 304M hybrid fiber connector (Optical Link), Camera body 1x LEMO SMPTE 304M hybrid fiber connector (Optical Link), Camera head 1x LEMO custom 16 pin electronic viewfinder (EVF), Camera head 1x Fischer 2 pin 24 V power in (BAT), Camera head 2x Fischer 3 pin 24 V remote start and accessory power out (RS), Camera head 1x LEMO 10 pin Ethernet with 24 V power (ETHERNET), Camera head |
| SD Card | For importing ARRI Look Files, camera set up files, frame line files, feature license keys and custom lens tables for the Lens Data Archive (LDA). Stores captured stills from the REC OUT image path in ARRIRAW (.ari, 12 bit), TIFF (.tif, 16 bit), DPX (.dpx, 10 bit) and JPEG (.jpg, 8 bit) format as well as logging files. Also used for software updates. |
| Upgrades | The Storage Interface Module (currently available for SxS PRO cards) can be exchanged for future storage modules. The Electronics Interface Module (available as either regular ALEXA or ALEXA Plus versions) can be exchanged for future control electronics. Exchangeable Lens Mount (ELM) allows other lenses beyond PL mount lenses to be used. Simple camera software updates. Licenses available for purchase: Anamorphic De-squeeze, High Speed, DNxHD. |
| Note: All technical data based on Software Update Packet (SUP) 5.0. All data subject to change without notice. |
Alexa Models
Amira Models
Discontinued Models
Alexa Camera Overview
ALEXA Mini
ALEXA XT Software Update 11.0
ALEXA Frameline Composer
ALEXA Software Update 11.0
ARRIRAWConverter Tutorials
