Thanks to Amin, I got a confirmation that the EP-3 does noise reduction independently of what you have configured the camera with: https://www.mu-43.com/f42/ep-3-viewer2-noise-processing-done-even-when-disabled-16532/ https://www.mu-43.com/f102/olympus-...ed-raw-camera-jpeg-comparison-high-iso-15758/ But I am still surprised at the unimpressive jpeg output (low light) that the camera gives even at ISO400 . My previous pictures were at ISO 800 and over. I was hopefull that the problem would not be as bad for lower ISOs. I have included two JPEGS. One out of camera and resized. The other one processed by Lightroom from RAW (default installation's sharpening and noise reduction) + resized. I'm not taking any chances anymore, I always shoot RAW in low light.