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Panasonic Lumix DMC-GH1 vs Panasonic Lumix DMC-GH2: read noise comparison

Panasonic Lumix DMC-GH1DxO

The Panasonic Lumix DMC-GH1 was measured at 6 ISO settings from ISO 100 to ISO 3200. Values were derived by Bill Claff from DxOMark lab data.

At base ISO (100) read noise is 1.48 DN. From ISO 400 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise.

Panasonic Lumix DMC-GH2

The Panasonic Lumix DMC-GH2 was measured at 19 ISO settings from ISO 160 to ISO 12800. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (160) read noise is 1.95 DN, or 5.7 electrons at the sensor. From ISO 1250 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 11,867 electrons; unity gain is around ISO 460.

Panasonic Lumix DMC-GH1 vs Panasonic Lumix DMC-GH2 read noise table

ISOPanasonic Lumix DMC-GH1Panasonic Lumix DMC-GH2
1001.485–
160–1.945
2002.0142.378
250–2.789
320–2.532
4003.3173.160
500–4.028
640–4.228
8007.1115.315
1000–7.727
1250–8.168
160015.6719.918
2000–13.929
2500–17.268
320031.55919.427
4000–28.246
5000–34.535
8000–49.522
10000–62.683
12800–77.172

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Data: Photons to Photos · © William J. Claff