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Panasonic Lumix DMC-GM1 vs Panasonic Lumix DMC-GM5: read noise comparison

Input-referred read noise at base ISO: Panasonic Lumix DMC-GM1 4.6 e⁻ (ISO 160), Panasonic Lumix DMC-GM5 6.8 e⁻ (ISO 100).

Panasonic Lumix DMC-GM1

The Panasonic Lumix DMC-GM1 was measured at 24 ISO settings from ISO 125 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (160) read noise is 1.13 DN, or 4.6 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 6400 don't change analog gain (digital push). Full well at base ISO is about 16,132 electrons; unity gain is around ISO 650.

Panasonic Lumix DMC-GM5

The Panasonic Lumix DMC-GM5 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 1.04 DN, or 6.8 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 25,930 electrons; unity gain is around ISO 650.

Panasonic Lumix DMC-GM1 vs Panasonic Lumix DMC-GM5 read noise table

ISOPanasonic Lumix DMC-GM1Panasonic Lumix DMC-GM5
100–1.042
1251.0791.079
1601.1251.141
2001.1891.214
2501.3571.376
3201.4541.505
4001.6361.682
5001.7781.866
6402.0992.056
8002.3622.378
10002.7132.789
12503.2493.364
16003.9184.000
20004.7904.790
25005.8165.856
32007.1117.013
40008.3408.634
500010.55610.629
640013.17712.996
800017.14816.679
1000021.11220.966
1280025.99226.173
1600033.59133.359
2000041.64341.070
2560051.26850.213

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Data: Photons to Photos · © William J. Claff