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Olympus PEN E-PL5 vs Olympus PEN E-PL7: read noise comparison

Olympus PEN E-PL5DxO

The Olympus PEN E-PL5 was measured at 8 ISO settings from ISO 200 to ISO 25600. Values were derived by Bill Claff from DxOMark lab data.

At base ISO (200) read noise is 1.13 DN. From ISO 3200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.

Olympus PEN E-PL7

The Olympus PEN E-PL7 was measured at 23 ISO settings from ISO 100 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (200) read noise is 0.97 DN, or 6.1 electrons at the sensor. From ISO 800 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 5000 don't change analog gain (digital push). Full well at base ISO is about 23,907 electrons; unity gain is around ISO 1250.

Olympus PEN E-PL5 vs Olympus PEN E-PL7 read noise table

ISOOlympus PEN E-PL5Olympus PEN E-PL7
100–0.979
2001.1330.973
250–1.149
320–1.376
4001.4341.087
500–1.292
640–1.558
8001.9191.866
1000–2.297
1250–2.809
16004.1703.458
2000–4.287
2500–5.389
32005.6966.869
4000–8.456
5000–10.411
640011.87613.269
8000–16.795
10000–20.821
1280021.11226.723
16000–33.359
20000–41.933
2560045.25551.625

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Data: Photons to Photos · © William J. Claff