When I first got the 6D2, I went out in front of the house at night and shot blooms on the bushes with just a little light spilling over from the front porch and maybe a bit from the street light a couple doors down. Everything was set on auto, and IS was turned on. The ISO turned out to be 40,000. The IS took care of shake. The color was surprisingly decent. And noise was easily toned down in ACR. It didn’t look like noontime on a sunny day, but it had an interesting look, and would be quite usable after moderate NR. I was much impressed.