How big is the 1-inch sensor of a mobile phone? It's actually bigger than the 1-inch sensor of a camera

Yesterday’s article didn’t mention “sensor size”. I didn’t expect people to have so many misunderstandings...

How much is 1 inch?

Due to some historical issues*, whether it is a camera or a mobile phone, the "1 inch" in the diagonal length of the sensor is not 25.4mm.

*Involving vacuum tubes, we do not expand them here. It is a bit like a horse’s butt deciding the width of a railroad track.

In order to avoid misunderstanding, the more rigorous writing is "Type 1.0" or "Type 1.0". Also, when the sensor size is less than 1/2 type, type 1 = 18mm; and when the sensor size is greater than or equal to 1/2 type, type 1 = 16mm.

So, the diagonal length of the 1/2 type sensor is 8mm, and the diagonal length of the 1/2.51 type sensor is 7.17mm. The latter is about 20% smaller than the former (not as it seems at first glance close to 40%).

*The actual length of the sensor diagonal has nothing to do with the "half circumference"! ! !

Medium format

Full frame is smaller than medium format, needless to say this. 44 x 33 medium format is about 68% better than 36×24 full frame.

How big is Super35?

Super35 covers a relatively large size range. For cameras, this size is basically equivalent to the 16:9 crop of the APS-C frame, which is smaller than the APS-C. For movie cameras, the width of many Super35 frames is much larger than the 23.5 of the APS-C. mm.

What exactly is M4/3?

M4/3 is neither the sensor size nor the sensor ratio. It is the earliest mirrorless system and a camera mount. Therefore, there is no such thing as "M4/3 format" - to describe the sensor size of most M4/3 cameras, it should be written as 4/3 type (inch) or 1.33 type (inch).

The most direct example: JVC GY-LS300 movie camera puts a 16:9 size Super35 frame sensor in the M4/3 mount. (The sensor size of Panasonic GH1/GH2/GH5S also exceeds 4/3 inches)

Is the "1 inch" on the phone the same as the camera?

I don't know why some people think that mobile phones are "opportunistic". In fact, the "1 inch" on Xiaomi, vivo, OPPO, and Huawei mobile phones is larger than the "1 inch" on Sony, Nikon, and Canon cameras. larger (about 10%).

On the one hand, the actual size of the Sony IMX989 and LYT-900 sensors used in current mobile phones is type 1.02 (or type 1/0.98), with a diagonal length of 16.38mm ( The equivalent coefficient is about 2.64);

The sensor diagonal of the 1-inch camera is 15.86mm (the equivalent coefficient is about 2.73). On the other hand, mobile phones use a 4:3 ratio and cameras use a 3:2 ratio. Even if the diagonal lengths are the same, the phone sensor is larger than the camera.

* Regarding the ratio, it is generally believed that the 3:2 of full-frame and APS-C is inherited from the film ratio (44×33 medium format also corresponds to 645 film), while the 4:3 of mobile phones and compact cameras is inherited from Vacuum tube (predecessor of CCD/CMOS).

Attachment: Mobile devices using "1-inch" sensor

Type 1.02 4:3 approximately 50MP sensor (IMX989/LYT-900):

- Xiaomi 12S Ultra, 13Pro, 13Ultra, 14 Ultra

- vivo X90 Pro, X90 Pro, X100Pro (and the upcoming X100S Pro, X100 Ultra)

- OPPO Find X6 Pro, Find X7 Ultra

- Huawei Pura 70 Ultra

- Sharp AQUOS R7, R8 Pro, Leitz Phone 2 (using about 94% of the entire sensor)

- DJI Pocket 3 (uses approximately 94% of the entire sensor)

1.0 type 3:2 approximately 20MP sensor

- Panasonic CM1/CM10

- DJI Air 2S

-Sharp AQUOS R6, Leitz Phone 1

-Sony Xperia Pro-I (uses about 60% of the entire sensor)

-insta360 ONE R Leica version ( Approximately 94% of the entire sensor is used)

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