Hand held without a tripod this iphone is taking better pictures in the dark than even the D-750. I'm not joking. Now if I can get any of them on a tripod and low ISO they pull ahead by a comfortable margin if you pixel peep. At iPhone screen sizes they look great. I think printed at 8x10 still would look great. Hand held though it's just crazy what this phone can do or on a tripod it's surprising. Granted it's basically a 1" exposure but the phones taking a whole bunch of shots at once and cherry-picking pixels. So no fast moving stuff. But even at ISO 51200 with a 1.8 prime I can't even get a proper exposure handheld with the D-750 and no problem with the iPhone. It's that dark and it's doing it. I think it's using Lidar to focus in total darkness.
I think some of the IBIS + stabilized lens sync combos can probably do what the Iphone is if you can handhold them a few seconds. I never thought I would see a phone beat the D-750 in the dark. Granted it's not stabilized at all so I can't hand hold lower than 1/15th or so when I'm braced, but still, wow.
The LED lighting is solar powered and very dim as its cold. Think near dead flashlight so barely any light out by the pool. I can't believe a smartphone is doing this. I could not get a handheld shot with the D-750, too dark, even at ISO 51200 @ 1/15th to give an idea of the light level out there.
D-750 with 20mm 1.8 G cropped to be near the 26mm iPhone lens. Both slightly adjusted JPEGS. ISO 100 10 seconds@ F 1.8......Tripod.
Iphone 12 night mode hand held 1 second ISO 3200.
D750 1/10th second ISO 3200 hand held.
Iphone 12 hand held. 1/5th second ISO 6400