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Panasonic Lumix G9 II (ES) vs Panasonic Lumix GH5 II: read noise comparison

Input-referred read noise at base ISO: Panasonic Lumix G9 II (ES) 2.7 e⁻ (ISO 100), Panasonic Lumix GH5 II 3.8 e⁻ (ISO 200).

Panasonic Lumix G9 II (ES)

The Panasonic Lumix G9 II (ES) (Lumix DC-G9M2) 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 (100) read noise is 9.71 DN, or 2.7 electrons at the sensor. From ISO 4000 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 17,777 electrons; unity gain is around ISO 30.

Panasonic Lumix GH5 II

The Panasonic Lumix GH5 II (Lumix DC-GH5M2) 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 3.8 electrons at the sensor. From ISO 2500 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 22,046 electrons; unity gain is around ISO 1110.

Panasonic Lumix G9 II (ES) vs Panasonic Lumix GH5 II read noise table

ISO	Panasonic Lumix G9 II (ES)	Panasonic Lumix GH5 II
50	9.318	–
64	9.318	–
80	9.514	–
100	9.714	0.629
125	9.849	0.674
160	10.339	0.790
200	10.928	0.683
250	10.629	0.768
320	11.236	0.871
400	12.295	1.014
500	14.825	1.214
640	17.268	1.444
800	20.821	1.729
1000	23.264	1.705
1250	28.641	2.085
1600	35.261	2.497
2000	43.111	3.074
2500	54.192	3.706
3200	67.649	4.532
4000	67.649	5.426
5000	83.865	6.635
6400	106.153	8.056
8000	133.436	10.267
10000	171.255	12.996
12800	215.269	16.223
16000	270.597	10.196
20000	340.144	13.086
25600	421.679	16.679

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