Current Date:10 December, 2022
Arri Alexa LF

Arri Introduces Large Format Camera : Arri Alexa LF

Arri Alexa LF

Arri intriduces a complete range of large format system. Bases on a large format 4k version of the Alexa Sensor, the system comprises Alexa LF Camera, Arri Signature Prime Lenses, LPL lens mount and PL-LPL Adaptor. These system elements have been designed to take fulkl advantage of the enlarged sensor while also offering compoatibilkity wiuth existing lenses, accessories and workflows.

Featuring a sensor slightly larger than full frame, ALEXA LF records native 4K with ARRI’s best overall image quality. This allows filmmakers to explore an immersive large-format aesthetic while retaining the sensor’s natural colorimetry, pleasing skin tones and stunning capability for HDR and WCG workflows. Versatile recording formats, including efficient ProRes and uncompressed, unencrypted ARRIRAW up to 150 fps, encompass all on-set workflow requirements.

ALEXA LF has the largest sensor of any full-frame cinema camera on the market. Maintaining the ALEXA family’s optimal pixel size for highest overall image quality results in a 4448 x 3096 picture, which can be recorded in full using the LF Open Gate mode. An LF 16:9 mode maximizes lens options while meeting 4K deliverable standards, and an LF 2.39:1 mode combines a cinematic widescreen image with high frame rates up to 150 fps for sensuous slow motion. All sensor modes offer true 800 ASA sensitivity as well as reduced noise, providing the perfect canvas for modern, subtle lighting techniques.

Accompanying the ALEXA LF camera are 16 large-format ARRI Signature Prime lenses, ranging from 12 mm to 280 mm and fitted with the ARRI LPL mount. While the Signature Primes exemplify state-of-the-art optical precision, they have been designed to render organic, emotionally engaging images, gently softening and texturizing the large format with natural skin tones and creamy bokeh. A fast T-stop of T1.8 facilitates shallow depth of field and the smooth focus fall-off gives subjects heightened presence in the frame.

The ARRI Signature Prime range is the first cine lens series to feature machined magnesium lens barrels, making the optics incredibly lightweight and robust. They are also the first to incorporate ARRI’s next-generation LDS-2 Lens Data System, with high data rates and absolute encoders for fast initializing. LDS-2 extends the possibilities of lens data and is being licensed to other lens and camera manufacturers.Arri Alexa LF


Camera Type Large Format (LF) digital camera with electronic viewfinder EVF-1 and built-in radios for ARRI Wireless Remote System, ARRI Wireless Video System and WiFi
Compatibility All current ARRI ALEXA accessories,

LPL lenses and PL lenses with PL-to-LPL adapter

Sensor Mode

LF Open Gate

36.70 x 25.54 mm

4448 x 3096, ø 44.71 mm

ARRIRAW: 0.75 – 90 fps,

ProRes: 0.75 – up to 60 fps

Sensor Mode

LF 16:9

31.68 x 17.82 mm

3840 x 2160, ø 36.35 mm

ARRIRAW: 0.75 – 90 fps,

ProRes: 0.75 – 60 fps

Sensor Mode

LF 2.39:1

36.70 x 15.31 mm

4448 x 1856, ø 39.76 mm

ARRIRAW: 0.75 – 150 fps,

ProRes: 0.75 – up to 100 fps

Shutter Electronic rolling shutter, 5.0º – 358.0º
Internal ND Filter One of 8 available Large Format Full Spectrum Neutral Density (LF FSND) filters can be inserted manually in front of the sensor (ND 0.3 to ND 2.4)


14+ stops
Exposure Index EI 800
Sound Level Sound level ≤ 20 db(A) while recording LF Open Gate ProRes 4.5 K 4444 @ 30 fps and ≤ +30° Celsius (≤ +86° Fahrenheit), measured 1 m/3 feet in front of the lens
Power In 11.5 to 34 V DC
Power Out 4x RS (24 V), 1x 12V (12 V), 1x EXT (24 V), 1x ETH (24 V)

(body + LPL)

7.8 kg/17.2 lbs.

(body + LPL)

L 364 mm/14.33”

W 201 mm/7.91”

H 158 mm/6.22”



-20° C to +45° C (-4° F to +113° F)
Lens Mount 62 mm LPL mount (LDS-1, LDS-2 & /i)
Flange Focal Depth 44 mm


ARRIRAW (.ari)

QuickTime/ProRes (422, 422 HQ, 4444 & 4444 XQ)



4.5K (sensor modes LF Open Gate and LF 2.39:1)

UHD (sensor mode LF 16:9)

2K (in-camera downscale in sensor mode LF 16:9)

HD (in-camera downscale in sensor mode LF 16:9)

Supported Media SxS PRO+ 256 GB (ProRes)

SXR Capture Drives 1 TB (ARRIRAW or ProRes)

SXR Capture Drives 2 TB (ARRIRAW or ProRes)

Monitor Outputs MON OUT 1a, 1b and 2: SDI 6G UHD or SDI 1.5G HD up to 30 fps.

MON OUT 3: SDI 1.5 G HD up to 30 fps, also wireless video

Anamorphic de-squeeze for 1.25x, 1.3x, 1.5x, 2x lens squeeze ratios

Image Processing 16 bit linear in ALEXA Wide Gamut/Log C color space

Target output color spaces: Log C, Rec 709 or Rec 2020

Supports ARRI Look File (ALF-2) with CDL values and a 3D LUT

3D LUTs available for SDR, HDR PQ and HDR HLG

Playback ARRIRAW or ProRes
Audio 1x XLR 5 pin AUDIO IN for 2 channels, line level

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