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Panasonic Lumix DMC-GX80 vs Panasonic Lumix DMC-GX85: read noise comparison

Input-referred read noise at base ISO: Panasonic Lumix DMC-GX80 3.7 e⁻ (ISO 100), Panasonic Lumix DMC-GX85 4 e⁻ (ISO 100).

Panasonic Lumix DMC-GX80

The Panasonic Lumix DMC-GX80 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 3.7 electrons at the sensor. From ISO 1000 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 27,276 electrons; unity gain is around ISO 690.

Panasonic Lumix DMC-GX85

The Panasonic Lumix DMC-GX85 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 0.55 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. Settings above ISO 6400 don't change analog gain (digital push). Full well at base ISO is about 28,843 electrons; unity gain is around ISO 730.

Panasonic Lumix DMC-GX80 vs Panasonic Lumix DMC-GX85 read noise table

ISOPanasonic Lumix DMC-GX80Panasonic Lumix DMC-GX85
1000.5400.555
1250.6420.637
1600.7580.753
2000.8070.796
2500.8650.847
3200.9530.986
4001.1021.181
5001.3291.376
6401.5691.659
8001.8151.919
10002.1892.297
12502.6392.809
16003.2723.411
20004.0284.347
25004.9255.426
32006.1906.681
40007.5168.282
50009.51410.126
640011.79412.641
800015.34816.450
1000018.76520.252
1280023.58825.107
1600030.06532.672
2000036.75839.671
2560046.52750.213

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Data: Photons to Photos · © William J. Claff