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Panasonic Lumix DMC-G5 vs Panasonic Lumix DMC-G7: read noise comparison

Panasonic Lumix DMC-G5DxO

The Panasonic Lumix DMC-G5 was measured at 8 ISO settings from ISO 160 to ISO 12800. Values were derived by Bill Claff from DxOMark lab data.

At base ISO (160) read noise is 1.71 DN. From ISO 1600 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.

Panasonic Lumix DMC-G7

The Panasonic Lumix DMC-G7 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 0.54 DN, or 4 electrons at the sensor. From ISO 1000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 29,041 electrons; unity gain is around ISO 740.

Panasonic Lumix DMC-G5 vs Panasonic Lumix DMC-G7 read noise table

ISOPanasonic Lumix DMC-G5Panasonic Lumix DMC-G7
100–0.540
125–0.651
1601.7050.774
2002.1890.841
250–0.871
320–0.979
4003.6051.173
500–1.385
640–1.602
8006.4981.905
1000–2.250
1250–2.789
16009.7813.387
2000–4.228
2500–5.315
320021.5566.498
4000–8.112
5000–9.646
640042.51812.467
8000–15.889
10000–19.427
1280084.44925.107
16000–31.779
20000–38.854
25600–48.168

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Data: Photons to Photos · © William J. Claff