ALEXA XT M Technical Data
| Camera Type | 35 format film-style digital camera with separate camera head and body, an electronic viewfinder, a 4:3/16:9 switchable active sensor area, built-in filter holder, Lens Data System. |
| Sensor | 35 format ALEV III CMOS sensor with Bayer pattern color filter array. |
| Photo Sites | 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 3168 x 1778 used for ProRes 3.2K 16:94:3 Full 2880 x 2160 used for ARRIRAW 4:3 Full 2868 x 2150 down sampled to 2048 x 1536 for ProRes 2K 4:3 4:3 Cropped Open Gate For a drawing with details about the recording areas, surround views and framelines, For a drawing with details about the recording areas, surround views and framelines, |
| Frame Rates | 16:9 ProRes HD 0.75 – 120 fps ProRes 2K 0.75 – 60 fps ProRes 3.2K 0.75 – 30 fps DNxHD HD 0.75 – 120 fps ARRIRAW 0.75 – 120 fps4:3 Full ProRes 2K 0.75 – 48 fps ARRIRAW 0.75 – 90 fps 4:3 Cropped Open Gate 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 XT cameras 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. Includes a built-in Internal Filter Module (IFM-1) filter holder that accepts one of eight Full Spectrum Neutral Density (FSND) filters (manual insertion/removal) |
| 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 19 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. 95 W power draw for body in typical use recording to SxS PRO cards at room temperature, without accessories. 40 W power draw for head in typical use recording ProRes at 24 fps to an SxS PRO card at room temperature without accessories. A 24 V power input to the body is required to power the camera head from the body through a standard SMPTE 311M hybrid fiber cable up to 50 meters, without accessories. The camera head has one 10.5 to 34 V DC power input that can be used to optionally power the head independently from the camera body to allow greater distances between head and body. |
| 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. The camera head offers two RS connectors and one ETHERNET connector, with the same specifics as on the camera body. |
| Weight | ALEXA XT M head: 2.9 kg/6.4 lbs. ALEXA XT M body with XR Module: 5.8 kg/12.8 lbs. |
| Dimensions | Head: Length: 212 mm/8.35”, width: 129 mm/5.08”, height: 149 mm/5.87” Body: Length: 323 mm/12.72”, width: 161 mm/6.33”, 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 LDS PL mount, Super 35 centered. 52.00 mm nominal flange focal depth without FSND filters. |
| Viewfinder | Optional electronic 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 anamorphic de-squeeze. For MON OUT additionally: Reel & clip number.For a graphic of which false color indicates which exposure level click here |
| Control | Camera body right: Main user interface with a 3” transflective 400 x 240 pixel LCD color screen, illuminated buttons, button lock and jog wheel. Camera body left: Operator interface with illuminated buttons and button lock. Camera head: REC button and POWER button (POWER button is active when head is run by local power supply through the head’s BAT input). 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 required). |
| In-camera Recording | In camera body: Uncompressed and unencrypted ARRIRAW, compressed and unencrypted QuickTime/ProRes or compressed and unencrypted MXF/DNxHD recording onto XR Capture Drives. With SxS Adapter: QuickTime/ProRes or MXF/DNxHD onto SxS PRO or SxS PRO+ cards. With CFast 2.0 Adapter: QuickTime/ProRes or MXF/DNxHD onto CFast 2.0 cards. All formats include embedded audio, timecode and metadata. ARRIRAW can additionally store an ASC Color Decision List (CDL) from an on-set network connection and a checksum per frame.For more details, click here |
| Recording Outputs | 2x 1.5G or 3G REC OUT BNC connectors for uncompressed 1920 x 1080 4:4:4 RGB or 4:2:2 YCbCr HD video 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. Embedded audio, time code, metadata and recording flag. ALEXA XT models do not offer ARRIRAW T-Link output.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 ARRIRAW, ProRes or DNxHD from XR Capture Drive or 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 (1) 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 (body) | 1x media slot for XR Capture Dive or SxS adapter 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 10-pin service Ethernet with 24 V power (ETH) 1x LEMO SMPTE 304M hybrid fiber connector (OPTICAL LINK) BNC connectors designed for fast exchange without camera disassembly. These connectors require a special tool. |
| Connectors (head) | 1x LEMO SMPTE 304M hybrid fiber connector (OPTICAL LINK) 1x LEMO custom 16 pin electronic viewfinder (EVF) 1x Fischer 2 pin 24 V power in (BAT) 2x Fischer 3 pin 24 V remote start and accessory power out (RS) 1x custom LEMO 10 pin service Ethernet (ETH) BNC connectors designed for fast exchange without camera disassembly. Requires a special tool. |
| SD Card | For importing and storing ARRI Look Files, camera set up files, frame line files, feature license keys, user pixel masks and custom lens tables for the Lens Data Archive (LDA). Stores captured stills from the REC OUT image path in 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 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. An easily exchangeable lens mount 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 (included), High Speed (included) and DNxHD. |
| Software Tools (apps) | ARRIRAW Converter (ARC) ARRI Look Creator (ALC) |
| Software Tools (online) | ALEXA Camera Simulator ALEXA Frame Line Composer (AFC) |
| (1) Frame grabs are not possible during High Speed, 16:9 2K, 16:9 3.2K, 4:3 2K, Open Gate or when the option ‘REC OUT = MON OUT Clone’ is chosen. | |
| Note: Technical data based on Software Update Packet SUP 11.0 (ALEXA XT/XR). All data subject to change without notice. |
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