This camera can see in the dark!!
Here's a handheld shot in moonlight; 6D, Canon 70-200 f/2.8L IS II at f/2.8; ISO 25,600; 1/15 second. JPEG SOOC, NR low. More seriously, the second photo was taken before sunrise and it's actually clean enough to be pleasant (Bosque del Apache; ISO 3200).