Panasonic G7 High ISO NR
Panasonic G7 Noise Reduction
The Panasonic G7 offers no fewer than 11(!) noise reduction levels, offering very fine granularity on noise reduction strength, however there doesn't appear to be a way to assign different NR levels to specific ISO ranges as we've seen on some cameras. The Panasonic G7 user manual doesn't say when noise reduction kicks in, so we've included crops from the entire range of ISOs in the tables below.
See for yourself how the Panasonic G7's default and -5 (lowest) noise reduction settings compare to RAW without noise reduction under daylight-balanced lighting. (Note that these RAW images also have no sharpening applied, so they're a little softer than camera JPEGs at low ISOs.) Click on any of the crops below to see the corresponding full-sized image.
The Panasonic G7's default noise reduction setting provides a good tradeoff between noise and detail at lower ISOs to our eye, but it has quite an impact on our difficult red-leaf swatch atlready at low ISOs, and turning noise reduction down to the lowest strength doesn't help that much. Still, we'd probably shoot with the lowest setting at higher ISOs and reduce noise ourselves in post-processing (or just shoot RAW). As you can see, the G7 already applies noise reduction at its lowest (extended) ISO of 100. At the other end of the ISO range, you can see that the G7 is quite effective at reducing chroma noise, even at the lowest NR setting.