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Canon PowerShot S120 vs Canon PowerShot S95: read noise comparison

Canon PowerShot S120DxO

The Canon PowerShot S120 was measured at 9 ISO settings from ISO 80 to ISO 12800. Values were derived by Bill Claff from DxOMark lab data.

At base ISO (80) read noise is 1.30 DN. From ISO 3200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.

Canon PowerShot S95

The Canon PowerShot S95 was measured at 17 ISO settings from ISO 80 to ISO 3200. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (80) read noise is 1.48 DN, or 3.3 electrons at the sensor. From ISO 80 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 8,700 electrons; unity gain is around ISO 170.

Canon PowerShot S120 vs Canon PowerShot S95 read noise table

ISOCanon PowerShot S120Canon PowerShot S95
801.3011.485
1001.6251.945
125–2.428
160–3.138
2002.7893.837
250–4.790
320–6.148
4005.7767.727
500–9.448
640–12.042
80010.62915.137
1000–18.765
1250–23.588
160019.02730.065
2000–37.271
2500–46.851
320030.91058.892
640082.139–
12800190.019–

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Data: Photons to Photos · © William J. Claff