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What is the crop factor of the Sony A7?

The Sony Alpha A7 is equipped with a full frame sensor, whose diagonal measures 43mm. The sensor has a crop factor (or format factor, or focal length multiplier) of 1.0.

The crop factor is defined as the ratio of the 35mm full-frame film diagonal to the diagonal of a digital sensor. This number indicates how a lens behaves in relation to the size of the image sensor.

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Sensor size comparison with a film slide

With a crop factor of 1.0, the sensor in the Sony A7 has a similar size as a 35mm film slide or negative. As a result, a lens that is attached to the Sony A7 will offer the same angle of view and provide the same depth of field as a lens of the same focal length and aperture on a film camera.

Sony A7 and Credit Card sensor measures

Sensor specs and performance

The table below compares the sensor specs of the Sony A7 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 A7 Full Frame 24.0 6000 40001080/60p24.814.2224890
2.
 
Nikon D610 Full Frame 24.2 6016 40161080/30p25.114.4292594
3.
 
Panasonic GH4 Four Thirds 15.9 4608 34564K/30p23.212.879174
4.
 
Samsung NX1 APS-C 28.0 6480 43204K/30p24.213.2136383
5.
 
Sony A7C Full Frame 24.0 6000 40004K/30p25.014.7340795
6.
 
Sony A7 III Full Frame 24.0 6000 40004K/30p25.014.7373096
7.
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
8.
 
Sony A7S Full Frame 12.0 4240 28321080/60p23.913.2370287
9.
 
Sony A7R Full Frame 36.2 7360 49121080/60p25.614.1274695
10.
 
Sony RX1R Full Frame 24.0 6000 40001080/60p25.013.6253791
11.
 
Sony RX1 Full Frame 24.0 6000 40001080/60p25.114.3253493
Further information on the sensor in the Sony A7 and the camera's operation can be found in the camera manual.

In the United States, the A7 was initially launched in October 2013 at a price of $1,699.

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Camera to camera comparisons

In case you are interested in seeing how this camera compares to another one, just make a corresponding selection in the search boxes below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications Summary
    Camera Model Sony A7
    Camera Type Mirrorless system camera
    Camera Lens Sony E mount lenses
    Launch Date October 2013
    Launch Price USD 1 699
    Sensor Specs
    Sensor Technology CMOS
    Sensor Format Full Frame Sensor
    Sensor Size 35.8 x 23.9 mm
    Sensor Area 856 mm2
    Sensor Diagonal 43 mm
    Crop Factor 1.0x
    Sensor Resolution 24 Megapixels
    Image Resolution 6 000 x 4 000 pixels
    Pixel Pitch 5.97 μm
    Pixel Density 2.80 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
    DXO Sensor Quality (score) 90
    DXO Color Depth (bits) 24.8
    DXO Dynamic Range (EV) 14.2
    DXO Low Light (ISO) 2248
    Screen Specs
    Viewfinder Type Electronic viewfinder
    Viewfinder Field of View 100%
    Viewfinder Magnification 0.71x
    Viewfinder Resolution 2400k dots
    Top-Level Screen no Top Display
    LCD Framing Live View
    LCD Size 3.0 inch
    LCD Resolution 1230k dots
    LCD Attachment Tilting screen
    V-logging Friendliness No front-flip
    Touch Input No touchscreen
    Shooting Specs
    Focus System On-Sensor Phase-detect
    Manual Focusing AidFocus Peaking
    Maximum Shutter Speed 1/8000s
    Continuous Shooting 5 shutter flaps/s
    Shutter Life Expectancy200 000 actuations
    Silent Shootingno E-Shutter
    Time Lapse Photographyno Intervalometer
    Fill Flash no On-Board 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
    USB Connector USB 2.0
    HDMI Port micro HDMI
    Microphone Port External MIC port
    Headphone Socket Headphone port
    Wifi Support Wifi built-in
    Near-Field Communication NFC built-in
    Body Specs
    Environmental SealingWeathersealed body
    Battery Type NP-FW50 power pack
    Battery Life (CIPA)340 shots per charge
    In-Camera Charging USB charging
    Body Dimensions 127 x 94 x 48 mm
    (5.0 x 3.7 x 1.9 in)
    Camera Weight 474 g (16.7 oz)

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