ARRI Alexa 35 Sensor Modes

A comparison of the ARRI Alexa 35 (aka Arri S35 4K) sensor modes - including image circles, codecs and maximum frame rates.

Ben Bateman

Updated August 28, 2022

·

4 min read

The new ARRI Alexa 35 camera (aka the ARRI S35 4K prior to its launch) has eight sensor modes, giving a total of fourteen recording formats (or nineteen if you include both ARRIRAW and ProRes where available for each format).

It can be difficult to remember the image circle, clip resolution, codecs and maximum frame rates offered in each mode, so we've summarised them for you here.

Visualising The Sensor Modes

Here is an interactive visualisation of the different sensor modes of the Alexa 35. 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.

Arri Alexa 35 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 35 Sensor Mode Comparison
Sensor Mode Clip Resolution Codecs Max FPS

4.6K 3:2 Open Gate

4608 x 3164

ARRIRAW

75

ProRes

60

4.6K 16:9

4608 x 2592 (4.6K)

ARRIRAW

75

4096 x 2304 (4K)

ProRes

75

4K 16:9

4096 x 2304 (4K)

ARRIRAW

120

ProRes

100

3840 x 2160 (UHD)

ProRes

120

2048 x 1152 (2K)

ProRes

120

1920 x 1080 (FHD)

ProRes

120

4K 2:1

4096 x 2048

ARRIRAW

120

ProRes

120

3.3K 6:5

3328 x 2790

ARRIRAW

100

ProRes

75

4096 x 1716 (4K 2.39:1 2X Ana)

ProRes

90

3K 1:1

3072 x 3072

ARRIRAW

100

ProRes

90

3840 x 1920 (3.8K 2:1 2X Ana)

ProRes

100

2.7K 8:9

3840 x 2160 (UHD 16:9 2X Ana)

ProRes

100

2K 16:9 S16

2048 x 1152 (2K)

ProRes

120

The ARRI Alexa 35 Sensor Modes

The ARRI Alexa 35 Sensor Modes

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