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What is the pixel pitch of the Sony A77 II?

The Sony Alpha SLT-A77 II provides 24 megapixels from an APS-C sensor. This pixel density gives rise to a size of the individual pixel of 3.91µm.

The pixel size or pixel pitch can be calculated by dividing the sensor area by the pixel count and then taking the square root. In particular, the sensor in the Sony A77 II measures 23.5mm in width and 15.6mm in height, so that the total imaging area of the sensor amounts to 367 mm2. Moreover, the A77 II has 6 000 horizontal pixels and 4 000 vertical pixels, for a total of 24 megapixels. Then, the size (height or width) of each individual pixel can be calculated as the square root of the ratio of the sensor area (367 mm2) to the MP count (24 000 000).

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Larger pixels provide advantages with respect to gathering light, particularly in low-light situations. Large pixels notably have a better signal to noise ratio, meaning that they can better differentiate between incoming photons and the noisy signals that the internal processes of the camera create. As a result, big pixels are particularly helpful to the photographer when shooting with high ISO settings.

Sensor specs and performance

The table below compares the sensor specs of the Sony A77 II to those of several similar cameras. The reported DXO values are indicators of the sensor's imaging quality (higher is better), covering 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 A77 II APS-C 24.0 6000 40001080/60p23.512.7144277
2.
 
Canon G3 X 1-inch 20.0 5472 36481080/60p21.412.352163
3.
 
Nikon D7200 APS-C 24.0 6000 40001080/60p24.514.6133387
4.
 
Panasonic GX8 Four Thirds 20.2 5184 38884K/30p23.512.680675
5.
 
Sony A9 Full Frame 24.0 6000 40004K/30p24.913.3351792
6.
 
Sony A6500 APS-C 24.0 6000 40004K/30p24.513.7140585
7.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
8.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
9.
 
Sony A68 APS-C 24.0 6000 40001080/60i24.113.570179
10.
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
11.
 
Sony A77 APS-C 24.0 6000 40001080/60p24.013.280178
Note: DXO values in italics represent estimates based on sensor size and age.
Further information on the sensor in the Sony A77 II and the camera's operation can be found in the camera manual.

In the United States, the A77 II was initially launched in May 2014 at a price of $1,199.

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Camera to camera comparisons

In case you would like to check on the differences and similarities with other camera models, just make your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications Summary
    Camera Model Sony A77 II
    Camera Type Digital single lens reflex
    Camera Lens Sony A mount lenses
    Launch Date May 2014
    Launch Price USD 1 199
    Sensor Specs
    Sensor Technology CMOS
    Sensor Format APS-C Sensor
    Sensor Size 23.5 x 15.6 mm
    Sensor Area 367 mm2
    Sensor Diagonal 28.2 mm
    Crop Factor 1.5x
    Sensor Resolution 24 Megapixels
    Image Resolution 6 000 x 4 000 pixels
    Pixel Pitch 3.91 μm
    Pixel Density 6.55 MP/cm2
    Moiré control Anti-Alias filter
    Movie Capability 1080/60p Video
    ISO Setting 100 - 25 600 ISO
    ISO Boost 50 - 51 200 ISO
    Image Processor BIONZ X
    Screen Specs
    Viewfinder Type Electronic viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.73x
    Viewfinder Resolution 2359k dots
    Top-Level Screen Control Panel
    LCD Framing Live View
    LCD Size 3.0 inch
    LCD Resolution 1229k dots
    LCD Attachment Fully flexible screen
    V-logging Friendliness Front-flip possible
    Touch Input No touchscreen
    Shooting Specs
    Focus System Phase-detect AF
    Manual Focusing AidFocus Peaking
    Maximum Shutter Speed 1/8000s
    Continuous Shooting 12 shutter flaps/s
    Shutter Life Expectancy150 000 actuations
    Silent Shootingno E-Shutter
    Time Lapse Photographyno Intervalometer
    Image StabilizationIn-body stabilization
    Fill Flash Built-in Flash
    Storage Medium MS or SDXC cards
    Single or Dual Card Slots Single card slot
    UHS card support UHS-I
    Connectivity Specs
    External Flash Hotshoe
    Studio Flash PC Sync socket
    USB Connector USB 2.0
    HDMI Port mini HDMI
    Microphone Port External MIC port
    Wifi Support Wifi built-in
    Near-Field Communication NFC built-in
    Body Specs
    Environmental SealingWeathersealed body
    Battery Type NP-FM500H power pack
    Battery Life (CIPA)480 shots per charge
    Body Dimensions 143 x 104 x 81 mm
    (5.6 x 4.1 x 3.2 in)
    Camera Weight 647 g (22.8 oz)

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