Panasonic LUMIX DC-GH5M2GN Operating Instructions Manual page 274

7. Metering/Exposure/ISO Sensitivity – ISO Sensitivity
3
Confirm your selection.
≥Press the shutter button halfway.
Characteristics of the ISO Sensitivity
By increasing the ISO sensitivity, the shutter speed can be increased in dark places
to prevent camera shake and subject blur. However, higher ISO sensitivities also
increase the amount of noise in the recorded images.
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