ARRI Alexa Mini LF Recording Resolutions

A summary of the resolution and codec options available in the different sensor modes of the ARRI Alexa Mini LF digital cinema camera.

Jamie Harris

Updated August 25, 2022

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3 min read

The ARRI Alexa Mini LF has a total of nine sensor modes (as of SUP 7.1). It can be difficult to remember the image circle, clip resolution, codecs and frame rates offered in each mode, so we've summarised them for you here.

Visualising The Different Modes

Here is an interactive visualisation of the different sensor modes. For each mode you can see the number of pixels (photosites) of the sensor used, the physical size of the sensor area used to record the image, and the image circle needed to cover the sensor mode (useful for determining if your lens choice will cover the mode you intend to use).

Hover over an area or click/tap it to see a summary of the sensor mode.

Alexa Mini LF sensor modes. Hover over a mode, or click/tap it to see a summary of the mode.

Recording Resolutions and Codec Options

Some sensor modes allow you to choose a clip resolution different to the number of pixels used by the sensor mode, while others do not. Modes also offer different codec options (ARRIRAW or ProRes) and maximum frame rates. Below is a breakdown of the options available for each mode.

ARRI Alexa Mini LF Sensor Mode Comparison
Sensor Mode Clip Resolution Codecs Max FPS

4.5K LF 3:2 Open Gate

4448 x 3096

ARRIRAW

40

ProRes

40

4.5K LF 2.39:1

4448 x 1856

ARRIRAW

60

ProRes

60

4.3K LF 16:9

3840 x 2160 (UHD)

ProRes

48

1920 x 1080 (Full HD)

ProRes

75

3.8K LF 16:9

3840 x 2160 (UHD)

ARRIRAW

60

ProRes

60

2048 x 1152 (2K)

ProRes

90

1920 x 1080 (Full HD)

ProRes

90

2.8K LF 1:1

2880 x 2880

ARRIRAW

60

ProRes

60

3.4K S35 3:2

3424 x 2202

ARRIRAW

60

3.2K S35 16:9

3200 x 1800

ProRes

75

3.2K S35 4:3

2880 x 2160

ProRes

75

2.8K S35 16:9

2880 x 1620

ProRes

100

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