GeekRadar / The comparison desk
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Cameras
Sony

Sony a7S

Camera

The sensor, in perspective.

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

Cameras

Sony a7S

Sensor area indexGeometric · full frame = 100
99.0
Active dimensions
35.80 × 23.90 mm
Active area
855.62 mm²
Crop factor
1.01 ×
Area vs full frame
-0.01 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
35.80 mm
Reference active height
23.90 mm
Sensor technology
CMOS
Reference capture area
Open Gate (Full Frame Stills)

Capture & exposure

Camera family
Mirrorless
Shutter
Rolling

Capture modes

4 capture modes
  • Open Gate (Full Frame Stills)
    Active height
    23.90 mm
    Active width
    35.80 mm
    Horizontal pixels
    4,240 px
    Vertical pixels
    2,832 px
  • 4K UHD - Wide (Video Open Gate)
    Active height
    20.10 mm
    Active width
    35.80 mm
    Horizontal pixels
    3,840 px
    Vertical pixels
    2,160 px
  • 1080p - Wide
    Active height
    20.10 mm
    Active width
    35.80 mm
    Horizontal pixels
    1,920 px
    Vertical pixels
    1,080 px
  • 1440x1080
    Active height
    20.10 mm
    Active width
    35.80 mm
    Horizontal pixels
    1,440 px
    Vertical pixels
    1,080 px