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How many Megapixels does the Sony A7 III have?

The Sony Alpha A7 III is equipped with a a full frame sensor that offers an image resolution of 24 megapixels (MP), or 24 million pixels. With its native aspect ratio of 3:2, the sensor has 6 000 horizontal pixels and 4 000 vertical pixels.

A 35mm film slide or negative contains 5-15 MP of useful detail, so that the Sony A7 III can be considered to be a high-resolution camera that outresolves any 35mm film camera.

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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 24 MP?

The maximum print size of the Sony A7 III for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 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 A7 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 A7 III Full Frame 24.0 6000 40004K/30p25.014.7373096
2.
 
Nikon Z6 Full Frame 24.3 6048 40244K/30p25.314.3329995
3.
 
Panasonic GH5 Four Thirds 20.2 5184 38884K/60p23.913.080777
4.
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
5.
 
Sony A7 IV Full Frame 32.7 7008 46724K/60p25.414.7337997
6.
 
Sony A7C Full Frame 24.0 6000 40004K/30p25.014.7340795
7.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
8.
 
Sony A7R IIIA Full Frame 42.2 7952 53044K/30p26.014.73523100
9.
 
Sony A7R IV Full Frame 60.2 9504 63364K/30p26.014.8334499
10.
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
11.
 
Sony A9 II Full Frame 24.0 6000 40004K/30p25.014.0343493
Further information on the sensor in the Sony A7 III and the camera's operation can be found in the camera manual.

In the United States, the A7 III was initially launched in February 2018 at a price of $1,999.

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Check A7 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 A7 III
    Camera Type Mirrorless system camera
    Camera Lens Sony E mount lenses
    Launch Date February 2018
    Launch Price USD 1 999
    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 24 Megapixels
    Image Resolution 6 000 x 4 000 pixels
    Pixel Pitch 5.94 μm
    Pixel Density 2.83 MP/cm2
    Moiré control Anti-Alias filter
    Movie Capability 4K/30p Video
    ISO Setting 100 - 51 200 ISO
    ISO Boost 50 - 204 800 ISO
    Image Processor BIONZ X
    DXO Sensor Quality (score) 96
    DXO Color Depth (bits) 25.0
    DXO Dynamic Range (EV) 14.7
    DXO Low Light (ISO) 3730
    Screen Specs
    Viewfinder Type Electronic viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.78x
    Viewfinder Resolution 2359k dots
    Top-Level Screen no Top Display
    LCD Framing Live View
    LCD Size 3.0 inch
    LCD Resolution 922k dots
    LCD Attachment Tilting screen
    V-logging Friendliness No front-flip
    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 PhotographyIntervalometer Built-in
    Image StabilizationIn-body stabilization
    Fill Flash no On-Board Flash
    Storage Medium MS or SDXC cards
    Single or Dual Card Slots Dual card slots
    UHS card support Single UHS-II
    Connectivity Specs
    External Flash Hotshoe
    USB Connector USB 3.1
    HDMI Port micro HDMI
    Microphone Port External MIC port
    Headphone Socket Headphone port
    Wifi Support Wifi built-in
    Near-Field Communication NFC built-in
    Bluetooth Support Bluetooth built-in
    Body Specs
    Environmental SealingWeathersealed body
    Battery Type Sony NP-FZ100 power pack
    Battery Life (CIPA)610 shots per charge
    In-Camera Charging USB charging
    Body Dimensions 127 x 96 x 74 mm
    (5.0 x 3.8 x 2.9 in)
    Camera Weight 650 g (22.9 oz)

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