At low ISO settings, the E-M10 Mark III gives good image quality, with attractive colours, minimal noise and plenty of detail. Its JPEG processing does have a tendency to blur the lowest-contrast detail, but you’ll only see this if you look closely at your files onscreen. Image quality holds together well up to ISO 1600; there’s visibly more noise and noise-reduction in the JPEGs, but its main impact is in shadow areas. It’s only at ISO 3200 that noise starts to seriously degrade the image, although colours remain strong. Beyond this, image quality deteriorates noticeably: ISO 6400 is still perfectly usable for social media, as is ISO 12,800 at a pinch, but I’d avoid ISO 25,600.
The crops shown below are taken from the area outlined above in red