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Panasonic Lumix DMC-G7 vs Panasonic Lumix DMC-G85: read noise comparison

Input-referred read noise at base ISO: Panasonic Lumix DMC-G7 4 e⁻ (ISO 100), Panasonic Lumix DMC-G85 5.2 e⁻ (ISO 160).

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-G85

The Panasonic Lumix DMC-G85 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 (160) read noise is 1.18 DN, or 5.2 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 6400 don't change analog gain (digital push). Full well at base ISO is about 17,253 electrons; unity gain is around ISO 690.

Panasonic Lumix DMC-G7 vs Panasonic Lumix DMC-G85 read noise table

ISOPanasonic Lumix DMC-G7Panasonic Lumix DMC-G85
1000.5401.014
1250.6511.102
1600.7741.181
2000.8411.266
2500.8711.283
3200.9791.385
4001.1731.591
5001.3851.765
6401.6022.000
8001.9052.329
10002.2502.732
12502.7893.227
16003.3874.000
20004.2284.724
25005.3155.816
32006.4987.210
40008.1128.574
50009.64610.556
640012.46713.086
800015.88916.795
1000019.42720.966
1280025.10725.992
1600031.77933.128
2000038.85441.355
2560048.16851.268

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Data: Photons to Photos · © William J. Claff