What is the crop factor of the Sony RX100 III?

The Sony Cyber-shot DSC-RX100 III is equipped with an one-inch sensor, whose diagonal measures 15.9mm. The sensor has a crop factor (or format factor, or focal length multiplier) of 2.7.

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.

Sensor size comparison with a film slide

With a crop factor of 2.7, the sensor in the Sony RX100 III is smaller than the receptor area of a 35mm film slide or negative. As a result, the lens that is attached to the Sony RX100 III 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 19mm lens on the Sony RX100 III will provide the same angle of view and depth of field as a 50mm normal lens on a film camera (19mm * 2.7 = 50mm).

Sensor specs and performance

The table below compares the sensor specs of the Sony RX100 III 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.

Sensor Characteristics

		Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
1.		Sony RX100 III	1-inch	20.0	5472	3648	1080/60p	22.4	12.3	495	67
2.		Canon G5 X	1-inch	20.0	5472	3648	1080/60p	21.4	12.3	471	62
3.		Canon G7 X	1-inch	20.0	5472	3648	1080/60p	23.0	12.7	556	71
4.		Panasonic FZ1000	1-inch	20.0	5472	3648	4K/30p	22.1	11.7	517	64
5.		Sony RX100	1-inch	20.0	5472	3648	1080/60p	22.6	12.4	390	66
6.		Sony RX100 II	1-inch	20.0	5472	3648	1080/60p	22.5	12.4	483	67
7.		Sony RX100 IV	1-inch	20.0	5472	3648	4K/30p	22.8	12.6	591	70
8.		Sony RX100 V	1-inch	20.0	5472	3648	4K/30p	22.8	12.4	586	70
9.		Sony RX100 VII	1-inch	20.0	5472	3648	4K/30p	21.8	12.4	418	63
10.		Sony ZV-1	1-inch	20.0	5472	3648	4K/30p	22.2	12.6	669	66
11.		Sony ZV-1 II	1-inch	20.0	5472	3648	4K/30p	22.3	12.9	965	67
Note: DXO values in italics represent estimates based on sensor size and age.

In the United States, the RX100 III was initially launched in May 2014 at a price of $799.

Check RX100 III offers at
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Camera to camera comparisons

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