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How many Megapixels does the Sony A7S III have?

The Sony Alpha 7S III is equipped with a a full frame sensor that offers an image resolution of 12 megapixels (MP), or 12 million pixels. With its native aspect ratio of 3:2, the sensor has 4 240 horizontal pixels and 2 832 vertical pixels.

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A high megapixel count makes it possible to crop any captured image substantially or to make very large prints from the image file. On the downside, large megapixel files are slower to transfer and take up more storage space on the computer harddisk. Also, high-resolution imaging requires sharper, more expensive lenses than low-res picture taking.

How large can I print with 12 MP?

The maximum print size of the Sony A7S III for good quality output (200 dots per inch) amounts to 21.2 x 14.2 inches or 53.8 x 36 cm, for very good quality (250 dpi) 17 x 11.3 inches or 43.1 x 28.8 cm, and for excellent quality (300 dpi) 14.1 x 9.4 inches or 35.9 x 24 cm. Few people actually print their images that large on a regular basis, but it is nice to have the option to make very large prints of exceptional shots. Also, as mentioned earlier, a key advantage of high-MP cameras is that it is possible to crop an image ex-post and thereby, for example, change the composition of the capture or zoom in on some detail.

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Sensor specs and performance

The table below compares the sensor specs of the Sony A7S III to those of several similar cameras. In addition to sensor class and megapixel count, DXO values are reported as indicators of the sensor's imaging quality (higher is better). Three aspects are covered: color depth (DXO Portrait), dynamic range (DXO Landscape), and high-ISO noise (DXO Sports). Larger sensor cameras tend to outperform cameras of the same generation that are equipped with a smaller imager. On the other hand, larger sensors are more expensive and require bigger and heavier lenses than smaller light receptors.

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Sensor Characteristics
#   Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Sony A7S III Full Frame 12.0 4240 28324K/120p23.713.9252086
2.
 
Sony A7R V Full Frame 60.2 9504 63368k/24p26.514.83187100
3.
 
Sony A1 Full Frame 49.8 8640 57608k/30p25.914.5316398
4.
 
Sony A7 IV Full Frame 32.7 7008 46724K/60p25.414.7337997
5.
 
Sony A7R IIIA Full Frame 42.2 7952 53044K/30p26.014.73523100
6.
 
Sony A7R IVA Full Frame 60.2 9504 63364K/30p26.014.8334499
7.
 
Sony A9 II Full Frame 24.0 6000 40004K/30p25.014.0343493
8.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
9.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
10.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
11.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
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Further information on the sensor in the Sony A7S III and the camera's operation can be found in the camera manual.

In the United States, the A7S III was initially launched in July 2020 at a price of $3,499.

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Check A7S III price at
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Camera to camera comparisons

If you would like to see a side-by-side review with another camera, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications Summary
    Camera Model Sony A7S III
    Camera Type Mirrorless system camera
    Camera Lens Sony E mount lenses
    Launch Date July 2020
    Launch Price USD 3 499
    Sensor Specs
    Sensor Technology BSI-CMOS
    Sensor Format Full Frame Sensor
    Sensor Size 35.6 x 23.8 mm
    Sensor Area 847 mm2
    Sensor Diagonal 42.8 mm
    Crop Factor 1.0x
    Sensor Resolution 12 Megapixels
    Image Resolution 4 240 x 2 832 pixels
    Pixel Pitch 8.40 μm
    Pixel Density 1.42 MP/cm2
    Moiré control Anti-Alias filter
    Movie Capability 4K/120p Video
    ISO Setting 80 - 102 400 ISO
    ISO Boost 40 - 409 600 ISO
    Image Processor BIONZ XR
    DXO Sensor Quality (score) 86
    DXO Color Depth (bits) 23.7
    DXO Dynamic Range (EV) 13.9
    DXO Low Light (ISO) 2520
    Screen Specs
    Viewfinder Type Electronic viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.91x
    Viewfinder Resolution 9440k dots
    Top-Level Screen no Top Display
    LCD Framing Live View
    LCD Size 3.0 inch
    LCD Resolution 1440k dots
    LCD Attachment Swivel screen
    V-logging Friendliness Front-flip possible
    Touch Input Touchscreen
    Shooting Specs
    Focus System On-Sensor Phase-detect
    Manual Focusing AidFocus Peaking
    Maximum Shutter Speed 1/8000s
    Continuous Shooting 10 shutter flaps/s
    Shutter Life Expectancy200 000 actuations
    Silent ShootingElectronic Shutter
    Time Lapse Photographyno Intervalometer
    Image StabilizationIn-body stabilization
    Fill Flash no On-Board Flash
    Storage Medium CFexA or SDXC cards
    Single or Dual Card Slots Dual card slots
    UHS card support Dual UHS-II
    Connectivity Specs
    External Flash Hotshoe
    USB Connector USB 3.2
    HDMI Port full HDMI
    Microphone Port External MIC port
    Headphone Socket Headphone port
    Wifi Support Wifi built-in
    Bluetooth Support Bluetooth built-in
    Body Specs
    Environmental SealingWeathersealed body
    Battery Type Sony NP-FZ100 power pack
    Battery Life (CIPA)600 shots per charge
    In-Camera Charging USB charging
    Body Dimensions 127 x 97 x 81 mm
    (5.0 x 3.8 x 3.2 in)
    Camera Weight 699 g (24.7 oz)

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