I have noticed several comments, here on my blog as well on forum discussions, mentioning how it was almost impossible (ok, impossible is a very strong word, or simply put as "unlikely") the shots I took with Olympus cameras (E-M5, E-M1, E-M10) exhibiting so little noise, looking so clean when I was shooting at high ISO settings (ISO3200-6400).
Before we step any further in this subject, I would like to clarify a few items. I never mentioned that you do not see noise in Olympus high ISO shots, and surely I also did not mention that the shots were "clean" and "noise-free". I always, always have been careful when it comes to touchy subjects like high ISO shooting, and I always mentioned my high ISO shots were "good enough" and noise was handled, or controlled well. Noise is present in image even at lower ISO settings, it is either the noise was smoothened out by in camera processing or too negligible to be detected with normal computer screen views. How tolerable the amount of visible noise in high ISO varies from person to person. I was perfectly fine with E-M1's ISO6400 ouput, but showing the exact same image to a friend, he cringed even at the sight of some luminance noise (which I was perfectly fine with since it did not add any destructive effect to the image, instead adding "structure" which looked nice, in my own opinion).
I do have to reiterate that Olympus cameras CAN shoot very good images, and I shall put a stop at ISO6400 here. Yes we can go higher and still get away with usable images, but we all know there are other "higher end" cameras that can do better. The problem here is, many people thought that I somehow miraculously managed to shoot "supposedly" clean ISO3200 and ISO6400 images.
ISO3200, Olympus OM-D E-M1 and M.Zuiko 40-150mm F2.8 PRO lens
ISO6,400, OM-D E-M10 and M.Zuiko 75mm F1.8