ARRI's new large-format camera system consists of the ALEXA LF camera, ARRI Signature Prime lenses, LPL lens mount and PL-to-LPL Adapter. Featuring a sensor slightly larger than full frame, the ALEXA LF camera records native 4.5K with ARRI’s best overall image quality. This allows filmmakers to explore the immersive large-format aesthetic while retaining the sensor’s natural colorimetry, pleasing skin tones and stunning capability for HDR workflows. Versatile recording formats, including efficient ProRes and uncompressed, unencrypted ARRIRAW up to 150 fps, encompass all on-set workflow requirements.
Although the camera, lens mount and lenses are new, full compatibility with existing PL mount lenses and ALEXA accessories is a cornerstone of the system's design. A PL-to-LPL adapter offers backwards compatibility with all PL mount lenses, be they Super 35 or full frame. The adapter attaches securely to the LPL lens mount without tools, allowing crews to rapidly switch between PL and LPL lenses on set. Cinematographers are therefore offered an unlimited lens choice, with complete lens metadata accessible from LDS-2, LDS-1 or /i lenses.
For even further cross-system compatibility, an LPL lens mount can be fitted to existing ALEXA, ALEXA Mini and AMIRA cameras. ARRI Signature Primes and other future LPL mount lenses can therefore be used for both Super 35 and large format on productions combining the two.
Sensor Type
Large Format ARRI ALEV III (A2X) CMOS sensor with Bayer pattern color filter array
Sensor Maximum Resolution and Size
4448 x 3096 36.70 x 25.54 mm / 1.444 x 1.005" ⌀ 44.71 mm / 1.760"
Sensor Frame Rates
0.75 - 150 fps
Weight
∼7.8 kg / ∼17.2 lbs (camera body with LPL lens mount)
Sensor Active Image Area (photosites)
LF Open Gate ProRes 4.5K: 4448 x 3096 LF Open Gate ARRIRAW 4.5K: 4448 x 3096 LF 16:9 ProRes HD: 3840 x 2160 LF 16:9 ProRes 2K: 3840 x 2160 LF 16:9 ProRes UHD: 3840 x 2160 LF 16:9 ARRIRAW UHD: 3840 x 2160 LF 2.39:1 ProRes 4.5K: 4448 x 1856 LF 2.39:1 ARRIRAW 4.5K: 4448 x 1856
Sensor Active Image Area (dimensions)
LF Open Gate ProRes 4.5K: 36.70 x 25.54 mm / 1.445 x 1.006" LF Open Gate ARRIRAW 4.5K: 36.70 x 25.54 mm / 1.445 x 1.006" LF 16:9 ProRes HD: 31.68 x 17.82 mm / 1.247 x 0.702" LF 16:9 ProRes 2K: 31.68 x 17.82 mm / 1.247 x 0.702" LF 16:9 ProRes UHD: 31.68 x 17.82 mm / 1.247 x 0.702" LF 16:9 ARRIRAW UHD: 31.68 x 17.82 mm / 1.247 x 0.702" LF 2.39:1 ProRes 4.5K: 36.70 x 15.31 mm / 1.445 x 0.603" LF 2.39:1 ARRIRAW 4.5K: 36.70 x 15.31 mm / 1.445 x 0.603"
Recording File Container Size (pixel)
LF Open Gate ProRes 4.5K: 4480 x 3096 LF Open Gate ARRIRAW 4.5K: 4448 x 3096 LF 16:9 ProRes HD: 1920 x 1080 LF 16:9 ProRes 2K: 2048 x 1152 LF 16:9 ProRes UHD: 3840 x 2160 LF 16:9 ARRIRAW UHD: 3840 x 2160 LF 2.39:1 ProRes 4.5K: 4480 x 1856 LF 2.39:1 ARRIRAW 4.5K: 4448 x 1856
Exposure Latitude
14+ stops over the entire sensitivity range from EI 160 to EI 3200 as measured with the ARRI Dynamic Range Test Chart (DRTC-1)
Exposure Index
Adjustable from EI 160-3200 in 1/3 stops EI 800 base sensitivity
Shutter
Electronic shutter, 5.0°- 358°
Recording Formats
ARRIRAW (.ari) Apple ProRes 4444 XQ Apple ProRes 4444 Apple ProRes 422 HQ Apple ProRes 422
1x XLR 5pin balanced stereo line in (Line input max. level +24dBu correlating to 0dBFS)
Audio Output
3,5mm stereo headphone jack SDI (embedded)
Audio Recording
2 channel linear PCM, 24 bit 48 kHz
Remote Control Options
Web-based remote control from phones, tablets and laptops via WiFi & Ethernet WCU-4 hand-unit with control over lens motors and operational parameters via built-in white radio Remote Control Unit RCU-4 via Ethernet
Interfaces
1x LEMO 5pin LTC Timecode In/Out 1x BNC SDI Return In 1x LEMO 16pin EXT for accessories and sync 1x LEMO 10pin Ethernet for remote control and sync 1x SD Card (for user setups, look files etc) 3x Fischer 12pin connectors for CLM lens motors 2x Fischer 5pin LCS Lens Control System connectors for hand units
Wireless Interfaces
Built-in WiFi module (IEEE 802.11b/g) Built-in White Radio for ARRI lens and camera remote control Built-in Wireless Video System: 1920 x 1080, range 600m (2,000 ft) line of sight, OFDM (Orthogonal Frequency-Division Multiplexing) Bandwidth 40MHz, latency <1ms
Lens Mounts
LPL lens mount PL lens mount
Power Input
1x Fischer 2pin BAT connector (18.5-34 V DC) 1x On-board battery interface (19.5-34 V DC)
Measurements
158 x 201 x 351 mm / 6.22 x 7.91 x 14.33" (camera body with LPL lens mount)
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