Many thanks to the folks at PopFlash.Photo for the Leica M10 on loan. PopFlash.photo offers many accessories for Leica M and other brands, such as the Thumbs Up EP-MX for Leica M10 and the Leica Visoflex (Type 020) EVF.
See my Leica M wishlist.
I prefer to evaluate noise in terms of what it looks like for real shooting, that is, what if I were hiking and wanted to shoot handheld with sufficient shutter speed to minimize the risk of blur or for more depth of field: what would my results look like at, say, at ISO 800 or higher? Is this noise random and thus “film like” and does pattern noise show up. What about very blue lighting, or tungsten? And so on.
The lighting here was blue mountain shadow after the had resin, but still deep in shade—mostly skylight from a blue cloudless sky. Hence the red channel is of most interest as to how noise it gets. Such blue-light conditions are frequently found in the mountains, particularly in valleys and/or late in the year.
Includes image up to full resolution from ISO 100 through ISO 6400.