What is the crop factor of the YI M1?

The YI M1 is equipped with a Four Thirds sensor, whose diagonal measures 21.6mm. The sensor has a crop factor (or format factor, or focal length multiplier) of 2.0.

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.

Sensor size comparison with a film slide

With a crop factor of 2.0, the sensor in the YI M1 is smaller than the receptor area of a 35mm film slide or negative. As a result, a lens that is attached to the YI M1 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 25mm lens on the YI M1 will provide the same angle of view and depth of field as a 50mm normal lens on a film camera (25mm * 2.0 = 50mm).

Sensor specs and performance

The table below compares the sensor specs of the YI M1 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.		YI M1	Four Thirds	20.2	5184	3888	4K/30p	23.0	12.6	1030	73
2.		Canon SX430	1/2.3	19.9	5152	3864	720/25p	20.5	11.9	900	49
3.		Canon M100	APS-C	24.0	6000	4000	1080/60p	23.5	12.9	1272	78
4.		Canon SX730	1/2.3	20.2	5184	3888	1080/60p	20.5	11.9	924	50
5.		Canon G7 X Mark II	1-inch	20.0	5472	3648	1080/60p	21.8	11.9	260	62
6.		Canon SX420	1/2.3	19.9	5152	3864	720/25p	20.3	11.7	806	48
7.		Canon SX720	1/2.3	20.2	5184	3888	1080/60p	20.3	11.8	817	48
8.		Canon SX710	1/2.3	20.2	5184	3888	1080/60p	20.2	11.6	712	47
9.		Fujifilm X-A3	APS-C	24.0	6000	4000	1080/60p	23.8	13.1	1664	81
10.		Nikon 1 J5	1-inch	20.7	5568	3712	4K/15p	21.1	12.0	479	65
11.		Sony HX80	1/2.3	18.0	4896	3672	1080/60p	20.4	11.8	822	48
Note: DXO values in italics represent estimates based on sensor size and age.

In the United States, the M1 was initially launched in September 2016 at a price of $349.

Check M1 offers at
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Camera to camera comparisons

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