ARRI ALEXA Plus

The sensor, in perspective.

Capture area at a shared scale. The dashed outline is a 36 × 24 mm full-frame reference.

Cameras

Capture area

Sensor area indexGeometric · full frame = 100: 59.4
Active dimensions: 28.25 × 18.17 mm
Active area: 513.30 mm²
Crop factor: 1.29 ×
Area vs full frame: -0.75 stops

The index is calculated from area, assuming equal scene illumination, f-number and exposure time. It is not a low-light test or an image-quality score: lens transmission, quantum efficiency, noise and processing are not included. A crop mode changes the area used, not the physical sensor.

Dynamic range ≠ EV operating range. Autofocus and metering limits describe operating conditions. Manufacturer HDR claims appear separately below; independent dynamic-range measurements require a matched test method, ISO and noise threshold.

Sensor specifications

Reference active width: 28.25 mm
Reference active height: 18.17 mm
Sensor technology: CMOS
Reference capture area: Open Gate

Capture & exposure

Camera family: Cinema
Shutter: Electronic Rolling Shutter

Capture modes

4 capture modes

Open Gate
Active height
18.17 mm
Active width
28.25 mm
Horizontal pixels
3,424 px
Vertical pixels
2,202 px
16:9 2.8K
Active height
13.37 mm
Active width
23.76 mm
Horizontal pixels
2,880 px
Vertical pixels
1,620 px
2K
Active height
13.37 mm
Active width
23.76 mm
Horizontal pixels
2,048 px
Vertical pixels
1,152 px
HD
Active height
13.37 mm
Active width
23.76 mm
Horizontal pixels
1,920 px
Vertical pixels
1,080 px