Alexa LF 4.5K

The ARRI ALEXA LF production camera builds on what film makers love about the ARRI ALEXA Production camera line but now with the advantage of FULL FRAME 4.5k image capture that is NETFLIX approved.

Contained within a body similar to that of  the ALEXA SXT Plus, the ALEXA LF strives to be a true all round camera package for the Full Frame market. With an integrated video & lens control wireless system, the ALEXA LF offers the best value and widest range of uses when capturing Full Frame content. It also offers extra features such as; tilt/roll sensors, electronic horizon, additional connectors for camera and lens control, signal output and accessory power.

The integrated wireless radio for lens remote control allows communication to the ARRI WCU-4 for focus, zoom and iris adjustments while the ARRI Integrated Wireless Video System allows a wireless video feed from boot up; you can easily plug in and go! Not only saving time but also saving weight as the use of an ARRI UMC-4 and other wireless systems is no longer needed.


The Alexa LF records onto Codex Capture drives and then transferred via the supplied Thunderbolt Codex Reader*.

*Codex Drivers Required for Offloading Media

*WCU-4 Hand Control Unit, Focus Motor, Iris Motor & Zoom Motor not included

Technical Specifications
Sensor Large Format ARRI ALEV III (A2X) CMOS sensor with Bayer pattern colour filter array
Dimensions Length: 158mm Width: 201mm Height: 351 mm
Weight Approx: 7.8 kg
Lens Mounts Available LPL/PL (PL Mount Adapter Supplied)
Internal Filters N/A
Exposure Index EI 800 base sensitivity
Recording Media SXR Capture Drives (SxS Pro cards possible with adapters but no SxS Pro Cards Supplied)
Recording Formats LF Open Gate 4.5K: 4448 x 3096 ARRIRAW, LF Open Gate 4.5K: 4448 x 3096 ProRes, LF 16:9 UHD: 3840 x 2160 ARRIRAW, LF 16:9 UHD: 3840 x 2160 ProRes, LF 2.39:1 4.5K: 4448 x 1856 ARRIRAW, LF 2.39:1 4.5K: 4448 x 1856 ProRes, LF 16:9 2K: 3840 x 2160 down sampled to 2048 x 1152 ProRes, LF 16:9 HD: 3840 x 2160 down sampled to 1920 x 1080 ProRes
Recording Codec ProRes 4444XQ, 4444, 422 (HQ), 422, ARRIRAW
Recording Frame Rates 16:9 0.75 - 60 fps (LF 16:9 UHD/HD ProRes) LF 2.39:1 4.5K 0.75 - 100 fps (ProRes) LF 2.39:1 4.5K 0.75 - 150 fps (ARRIRAW) LF Open Gate 4.5K 0.75 - 90 fps (ARRIRAW)
Power Input 1 x Fischer 2pin BAT connector (18.5-34 V DC) 1 x On-board battery interface (19.5-34 V DC) - Approx 120 W power draw (recording ProRes 4444 at 24 fps in LF 16:9 sensor mode) - Approx 160 W (recording ARRIRAW at 90 fps in LF Open Gate sensor mode onto an SXR Capture Drive)
Optional Accessories
ARRI MkIV Follow Focus
ARRI WCU-4 with Focus CLM-4, Iris CLM-4 & Zoom CLM-3
LMB 4x5 3/2 Stage Clamp On Mattebox
O'Connor 25/75 Head & Legs
Ronford Atlas 40 Head & Legs