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Panasonic Lumix DC-GH7 vs Panasonic Lumix DC-GX9: read noise comparison

Input-referred read noise at base ISO: Panasonic Lumix DC-GH7 3.7 e⁻ (ISO 100), Panasonic Lumix DC-GX9 3.4 e⁻ (ISO 200).

Panasonic Lumix DC-GH7

The Panasonic Lumix DC-GH7 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 9.78 DN, or 3.7 electrons at the sensor. From ISO 3200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 23,983 electrons; unity gain is around ISO 40.

Panasonic Lumix DC-GX9

The Panasonic Lumix DC-GX9 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 0.93 DN, or 3.4 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 14,291 electrons; unity gain is around ISO 720.

Panasonic Lumix DC-GH7 vs Panasonic Lumix DC-GX9 read noise table

ISOPanasonic Lumix DC-GH7Panasonic Lumix DC-GX9
509.254–
649.318–
809.580–
1009.7810.871
12510.1960.993
16010.7781.181
20010.1960.933
25011.0811.102
32011.9591.301
40014.1231.569
50016.2231.853
64019.1602.250
80020.6782.266
100025.2812.676
125030.9103.272
160038.3193.945
200047.5054.857
250059.3025.938
320058.8927.311
400075.0618.938
500093.70111.004
6400118.60313.548
8000150.12317.509
10000187.40322.009
12800237.20727.665
16000300.24617.509
20000374.80622.316
25600474.41327.665

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Data: Photons to Photos · © William J. Claff