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What is the crop factor of the Sony A77 II?

The Sony Alpha SLT-A77 II is equipped with an APS-C sensor, whose diagonal measures 28.2mm. The sensor has a crop factor (or format factor, or focal length multiplier) of 1.5.

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 1.5, the sensor in the Sony A77 II is smaller than the receptor area of a 35mm film slide or negative. As a result, a lens that is attached to the Sony A77 II will offer a narrower angle of view and provide deeper depth of field than a lens of similar focal length and aperture on a film camera. The equivalent focal length is obtained by multiplying the actual focal length of the lens with the crop factor. For example, a 33mm lens on the Sony A77 II will provide the same angle of view and depth of field as a 50mm normal lens on a film camera (33mm * 1.5 = 50mm).

Sony A77 II and Credit Card sensor measures

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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