Panasonic Lumix DC-G9 vs Panasonic Lumix DC-GH6: read noise comparison

Input-referred read noise at base ISO: Panasonic Lumix DC-G9 3.9 e⁻ (ISO 200), Panasonic Lumix DC-GH6 1.1 e⁻ (ISO 800).

Panasonic Lumix DC-G9

The Panasonic Lumix DC-G9 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 (200) read noise is 0.68 DN, or 3.9 electrons at the sensor. From ISO 2000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 12800 don't change analog gain (digital push). Full well at base ISO is about 22,741 electrons; unity gain is around ISO 1150.

Panasonic Lumix DC-GH6

The Panasonic Lumix DC-GH6 was measured at 28 ISO settings from ISO 50 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (800) read noise is 18.90 DN, or 1.1 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 3,678 electrons; unity gain is around ISO 50.

Panasonic Lumix DC-G9 vs Panasonic Lumix DC-GH6 read noise table

ISO	Panasonic Lumix DC-G9	Panasonic Lumix DC-GH6
50	–	33.825
64	–	44.324
80	–	42.814
100	0.616	44.632
125	0.678	45.255
160	0.768	45.570
200	0.678	44.942
250	0.758	39.124
320	0.877	46.206
400	1.028	50.914
500	1.231	47.835
640	1.444	58.892
800	1.765	18.896
1000	1.753	21.259
1250	2.099	25.992
1600	2.603	31.559
2000	3.095	38.854
2500	3.784	48.168
3200	4.563	60.548
4000	5.540	77.172
5000	6.774	96.336
6400	8.340	120.259
8000	10.629	151.167
10000	13.737	192.672
12800	16.564	237.207
16000	10.629	296.112
20000	13.269	367.093
25600	16.795	458.253

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