ARRI ALEXA SXT Plus

The All-Rounder

The ALEXA SXT Plus is the most versatile and flexible of the ALEXA SXT cameras, a true all-rounder. With an integrated wireless radio for camera and lens remote control, tilt/roll sensors, electronic horizon and additional connectors for camera and lens control, signal output and accessory power, the ALEXA SXT Plus offers the best value and widest range of uses.

SKU: Alexa SXT-1 Categories: , Tags: ,
  • Description
  • Technical Specifications

Product Description

ALEXA SXT Plus Features Overview

  • Built-in remote control features
    • real-time wired or wireless remote control of lens and camera
    • plug and play with ARRI Electronic Control System (ECS)
    • compatible with cmotion cvolution lens control systems
  • Additional outputs
    • additional clone of MON OUT 1 (1.5G HD-SDI)
    • a third RS accessory power out
  • Built-in tilt and roll sensors
    • for electronic horizon in viewfinder and metadata
    • stored in metadata

Built-in Remote Control Features

With its built-in radio and lens motor electronics, the ALEXA SXT Plus makes working on set faster and more efficient. Plug the ARRI lens motors directly into the camera, turn on the wireless hand unit (like the WCU-4) and off you go. Integrating the wireless and lens control infrastructure into the camera not only saves time, but also weight, as a setup with an ALEXA SXT EV and an external motor control box would be more cumbersome to cable and heavier in sum. Compatibility with the ARRI hand units, like the WCU-4, as well as with the cmotion hand units makes this a supremely flexible tool.

Camera Type 35 format film-style digital camera with an electronic viewfinder, a 16:9, 6:5, 4:3 or Open Gate switchable active sensor area, built-in support for the ARRI Wireless Remote System and the cmotion cvolution lens control system, built-in filter holder, Lens Data System, integrated shoulder arch and receptacles for 15 mm lightweight rods
Sensor 35 format ALEV III CMOS sensor with Bayer pattern color filter array.
Photo Sites Sensor Mode 16:9 2880 x 1620 used for 16:9 ARRIRAW 2.8K 3168 x 1782 used for 16:9 ARRIRAW 3.2K 2880 x 1620 down sampled to 1920 x 1080 16:9 ProRes HD 2880 x 1620 down sampled to 2048 x 1152 for 16:9 ProRes 2K 3200 x 1800 used for 16:9 ProRes 3.2K 3200 x 1800 up sampled to 3840 x 2160 for 16:9 ProRes 4K UHD Sensor Mode 6:5 2578 x 2160 used for 6:5 ARRIRAW 2.6K 2560 x 2146 down sampled to 2048 x 858 for 6:5 ProRes 2K Anamorphic 2560 x 2146 re-sampled to 4096 x 1716 for 6:5 ProRes 4K Anamorphic Sensor Mode 4:3 2880 x 2160 used for 4:3 ARRIRAW 2.8K 2880 x 2160 used for 4:3 ProRes 2.8K Sensor Mode Open Gate 3424 x 2202 used for Open Gate ARRIRAW 3.4K 3424 x 2202 used for Open Gate ProRes 3.4K 3414 x 2198 up sampled to 4096 x 2636 for Open Gate ProRes 4K Cine
Operating Modes 16:9, 6:5, 4:3 or Open Gate sensor modes. Switching takes approx. 60 seconds. All sensor modes available in ARRIRAW and ProRes.
Frame Rates 16:9 0.75 - 120 fps 6:5 0.75 - 96 fps 4:3 0.75 - 96 fps Open Gate 0.75 - 90 fps All speeds adjustable with 1/1000 fps precision. Some limitations based on recording media or recording format apply. For a detailed table of frame rates 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 through 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.
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. Approx. 90 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 SXT Plus body with PL mount: 6.9 kg/15.1 lbs. ALEXA SXT Plus body with PL mount, electronic viewfinder, viewfinder cable, viewfinder mounting bracket and handle: 8.4 kg/18.6 lbs.
Dimensions ALEXA SXT Plus body with PL mount: Length: 331 mm/13.03”, width: 189 mm/7.44”, height: 157.8 mm/6.21”; dimensional drawings available in the ALEXA manual
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 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 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).
Recording Codecs Uncompressed and unencrypted ARRIRAW or compressed and unencrypted QuickTime/ProRes recording. All formats include embedded audio, timecode and metadata. For more details click here
Recording Media SxS PRO or SxS PRO+ cards (requires SxS Adapter 2) CFast 2.0 cards (requires CFast 2.0 Adapter 2) XR Capture Drives (requires XR Adapter) SXR Capture Drives (requires SXR Adapter) Note: XR Capture Drive Docks require Codex Production Suite to read XR Capture Drives recorded with ALEXA SXT.
Supported Media SxS PRO 64 GB (SBP-64A) SxS PRO+ 64 GB (SBP-64B & SBP-64C) SxS PRO+ 128 GB (SBP-128B & SBP-128C) LEXAR 3600x CFast 2.0 cards 256 GB XR Capture Drives 512 GB SXR Capture Drives 1 TB SXR Capture Drives 2 TB
Monitor Outputs 4x 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. MON OUT 1b is a clone of MON OUT 1a. 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: Log C, Rec 709 or Rec 2020. An ARRI Look File (ALF-2) containing the name of the target color space, CDL values and a 3D LUT can be applied to ProRes or MON OUT images and will be saved in metadata. Optional horizontal image mirroring.
Synchronization Master/Slave mode for precision sync of settings, sensor, processing, HD-SDI outputs and ARRIRAW or ProRes 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 or ProRes recorded material visible on EVF-1 and MON OUT. Playback audio available over headphone jack and embedded in the MON 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 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 1x media slot 4x 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 3x 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 1x Fischer 5-pin Lens Data Display LDD 2x Fischer 5-pin Lens Control System LCS 1x Fischer 12-pin for CLM-2, CLM-3, CLM-4 or later IRIS 1x Fischer 12-pin for CLM-2, CLM-3, CLM-4 or later FOCUS 1x Fischer 12-pin for CLM-2, CLM-3, CLM-4 or later ZOOM BNC connectors are designed for fast exchange without camera disassembly. These connectors require a special tool (ALEXA Plus BNC Removal Tool, K5.72915.0).
SD Card For importing and storing of ARRI Look Files, camera set up files, frame line files and user pixel masks and custom lens tables for the Lens Data Archive (LDA). Stores frame grabs in ARRIRAW (.ari, 12 bit), TIFF (.tif, 16 bit), DPX (.dpx, 10 bit) or JPEG (.jpg, 8 bit) format. 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 LDS PL mount lenses to be used. Simple camera software updates via free of charge Software Update Packets (SUPs).
Software Tools (apps) ARRIRAW Converter (ARC) ARRI Color Tool ARRI Meta Extract
Software Tools (online) ALEXA Camera Simulator Lens Illumination Guide ARRI Frame Line Composer (AFC) LUT Generator ARRI Formats & Datarate Calculator
Note: Technical data based on SXT Software Update Packet SUP 1.0. All data subject to change without notice.