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Panasonic Lumix GH5 II vs Panasonic Lumix LX100 II: read noise comparison

Input-referred read noise at base ISO: Panasonic Lumix GH5 II 3.8 e⁻ (ISO 200), Panasonic Lumix LX100 II 8.5 e⁻ (ISO 100).

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 LX100 II

The Panasonic Lumix LX100 II (Lumix DC-LX100M2) 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 0.97 DN, or 8.5 electrons at the sensor. From ISO 1600 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 34,593 electrons; unity gain is around ISO 880.

Panasonic Lumix GH5 II vs Panasonic Lumix LX100 II read noise table

ISO	Panasonic Lumix GH5 II	Panasonic Lumix LX100 II
100	0.629	0.973
125	0.674	0.908
160	0.790	1.094
200	0.683	0.959
250	0.768	0.953
320	0.871	1.189
400	1.014	1.404
500	1.214	1.753
640	1.444	2.114
800	1.729	2.028
1000	1.705	2.462
1250	2.085	2.990
1600	2.497	3.605
2000	3.074	4.438
2500	3.706	5.502
3200	4.532	6.589
4000	5.426	8.225
5000	6.635	10.196
6400	8.056	12.729
8000	10.267	15.671
10000	12.996	19.835
12800	16.223	25.281
16000	10.196	15.780
20000	13.086	19.973
25600	16.679	25.107

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