Alexa XT

Alexa XT

 

New Alexa XT Camera series by ARRI

ARRI introduced its new XT models of Alexa digital cinema cameras. The XT series was developed to replace all its predecessors. The newly revealed cameras are Alexa XT, the Alexa XT M, the Alexa XT Plus, and the Alexa XT Studio.
XR Module incorporated in the new cameras marks their difference from previous versions. The new side panel allows ARRIRAW, ProRes 4444, and DNxHD to be recorded in-camera to 512 GB XR Capture Drives. An SxS adapter will be available for compatibility with legacy media.
The XT cameras also include internal ND filters via the IFM-1 filter module, which allows them to be rated at EI800 in bright sunlight. Density of precision IRND filters range from ND 0.3 to ND 2.4.

The 4:3 sensor in a Super 35 configuration allows true anamorphic photography with an included “de-squeeze” license for getting the footage out of the camera at the proper aspect ratio. This 4:3 sensor can be used by non-anamorphic productions, as if they were shooting 4-perf 35mm, which allows reframing opportunities in post.
Alexa XT cameras enable shootings up to 120 fps and with an ARRI Lens Data System (LDS) it is possible to write the position of every LDS-compatible lens ring into metadata. Other features, viewfinder mounting bracket supported by two 15mm rods and a more noiseless fan present the stronger side of XT cameras.
Existing Alexa owners will have opportunity to upgrade their cameras. The following upgrade options are available: the XR Module, the IFM-1 in-camera filter module, the VMB-3 viewfinder mounting bracket and its cousin, the VEB-3 viewfinder extension bracket, the new XT fan, and the licenses for high-speed shooting and anamorphic de-squeeze.

 

ALEXA XT Technical Data

Camera Type 35 format film-style digital camera with an electronic viewfinder, a 4:3/16:9 switchable active sensor area, 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 Dual Gain Architecture (DGA) and Bayer pattern color filter array.
Photo Sites 16:9 2880 x 1620 used for ARRIRAW
2880 x 1620 down sampled to 1920 x 1080 for HD-SDI, ProRes HD and DNxHD HD
2868 x 1612 down sampled to 2048 x 1152 for ProRes 2K
Photo Sites 4:3 2880 x 2160 used for ARRIRAW
2868 x 2150 down sampled to 2048 x 1536 for ProRes 2K
For a pdf with details about the recording areas, surround views and framelines click here
Operating Modes 16:9 or 4:3 sensor mode. Switching takes approx. 60 seconds. 4:3 output only available for ARRIRAW and ProRes 2K recording.
Regular or High Speed mode. Switching takes approx. 40 seconds. High Speed mode is only available for 16:9 sensor mode.
Frame Rates 16:9 0.75 – 120 fps
60 fps max when recording 2K ProRes (16:9 and 4:3).
40 fps max when recording ProRes 4444 onto 32 GB SxS PRO cards.
All speeds adjustable with 1/1000 fps precision. To record above 60 fps, the camera needs to be switched to high speed mode.
Frame Rates 4:3 0.75 – 48 fps
40 fps max when recording any 4:2:2 ProRes codec onto 32 GB SxS PRO cards.
30 fps max when recording ProRes 4444 onto 32GB SxS PRO cards.
All speeds adjustable with 1/1000 fps precision.
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.
Filter Built-in Internal Filter Module (IFM-1) filter holder. 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 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 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 -8 to +8 CC. 1 CC corresponds to 035 Kodak CC values or 1/8 Rosco values.
Sound Level Under 19 db(A) while recording ProRes @ 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 on all inputs. Approx. 90 W power draw for camera and EVF-1 in typical use recording ProRes at 24 fps to an SxS PRO card, without accessories.
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 XT body with XR Module: 6.6 kg/14.5 lbs.
ALEXA XT body with XR Module, electronic viewfinder and handle: 8.0 kg/17.6 lbs.
Dimensions Length: 332 mm/12.95”, 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 ARRI Exchangeable Lens Mount (ELM); ships with Lens Adapter PL Mount with LDS contacts, 54 mm stainless steel 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 pixel to pixel magnification), EXP button (false color exposure check) and jog wheel.
Assistive Displays For EVF-1 and MON OUT: frame lines, surround view, 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 only: Reel & clip number.
For a graphic of which false colors indicate 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 RCU-4 for remote control via camera ETHERNET connector.
In-camera Recording uncompressed and unencrypted ARRIRAW, compressed and unencrypted QuickTime/ProRes or compressed and unencrypted MXF/DNxHD (1) recording onto XR Capture Drives. With SxS Adapter: QuickTime/ProRes or MXF/DNxHD (1) onto SxS PRO cards. All formats include embedded audio, timecode and metadata.
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.
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. Target color spaces for ProRes, DNxHD (1), REC OUT and MON OUT: Log C and 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.
Playback Playback of ARRIRAW, ProRes or DNxHD (1) from XR Capture Drive or playback of ProRes or DNxHD (1) from SxS PRO card 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 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 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. These connectors require a special tool.