I pretty much just got my new mirrorless camera at this time and I wanted to play with it a bit. I have started to take a liking in shooting in native monochrome on my camera. On this particular evening, I figured that I should go outside and do some high-ISO B&W shots. I was also a test how well the camera handles extreme ISO settings.
The first photo is taken with ISO 25600, I think it handles it really well.
The next two shots are with ISO 4000
ISO 28800, is visible but still does not destroy the photo.
ISO 51200 - This is extreme land now but I still think that the camera handles it well enough so the photo can be usable.
ISO 36000
ISO 16000
I can push my ISO setting manually up to 208 000 but I haven't tested it yet. There is not really any good reason why I would use ISO as high as this, except watching live view in a very dark place for composition. Still would be fun to test it out sometime.