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Canon PowerShot G15 vs Canon PowerShot G3 X: read noise comparison
Canon PowerShot G15DxO
The Canon PowerShot G15 was measured at 8 ISO settings from ISO 80 to ISO 6400. Values were derived by Bill Claff from DxOMark lab data.
At base ISO (80) read noise is 1.47 DN. From ISO 3200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.
Canon PowerShot G3 XDxO
The Canon PowerShot G3 X was measured at 8 ISO settings from ISO 125 to ISO 12800. Values were derived by Bill Claff from DxOMark lab data.
At base ISO (125) read noise is 4.69 DN. From ISO 1600 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.
Canon PowerShot G15 vs Canon PowerShot G3 X read noise table
| ISO | Canon PowerShot G15 | Canon PowerShot G3 X |
|---|---|---|
| 80 | 1.474 | – |
| 100 | 2.158 | – |
| 125 | – | 4.691 |
| 200 | 2.395 | 6.409 |
| 400 | 4.532 | 11.158 |
| 800 | 9.318 | 19.973 |
| 1600 | 18.379 | 36.252 |
| 3200 | 23.918 | 65.799 |
| 6400 | 76.639 | 127.116 |
| 12800 | – | 265.028 |
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