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Canon PowerShot G1 X Mark III vs Canon PowerShot G10: read noise comparison

Canon PowerShot G1 X Mark III

The Canon PowerShot G1 X Mark III was measured at 25 ISO settings from ISO 100 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 3.10 DN, or 5.4 electrons at the sensor. From ISO 5000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 27,947 electrons; unity gain is around ISO 180.

Canon PowerShot G10DxO

The Canon PowerShot G10 was measured at 5 ISO settings from ISO 100 to ISO 1600. Values were derived by Bill Claff from DxOMark lab data.

At base ISO (100) read noise is 6.59 DN. From ISO 100 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.

Canon PowerShot G1 X Mark III vs Canon PowerShot G10 read noise table

ISOCanon PowerShot G1 X Mark IIICanon PowerShot G10
1003.0956.589
1254.056–
1603.458–
2004.31713.361
2505.579–
3205.657–
4007.06225.457
5009.126–
64010.411–
80012.90653.817
100016.223–
125018.252–
160023.264103.250
200029.243–
250032.447–
320041.355–
400051.984–
500054.948–
640070.035–
800088.035–
10000110.661–
12800140.070–
16000171.255–
20000207.937–
25600250.732–

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Data: Photons to Photos · © William J. Claff