A very boring pic of our cat. This is a shot with the D750 at the 51200 ISO taken at 50mm, 1/250, f/1.8. The only light was maybe a 40 or 60 watt light bulb just behind me and at about the same level as the camera. Sure it’s noisy/grainy. The only touchup was lens correction which brightened the photo up just a tad. Otherwise, this is as it came from the camera. I’m impressed!