@
Strawberry
It was from a German Amazon review. I'll admit that the pictures there are rather small to rate sharpness with any kind of accuracy, but I wouldn't have been able to produce the the image in question with a phone by far, even at that size. Amazon sadly doesn't provide means to hotlink images, so
here is the full review. The relevant text quote that refers to this specific image is:
From the rest of the article it sounded like someone with some experience with cameras, and not just phones.
I don't think this will work as well with objects moving within the frame, of course. That would be insane. But simply not having to carry a tripod for sharp, presentable pictures from the night at the beach bar
without using a flash is rather neat, imho. Doesn't have to be as extreme as 4s. I've had terribly shaky photos with 1/50 or 1/100 that were beyond what photoshop could have made "acceptable".
As for the case with my camera: I'm a fool. It's the D5
200.
Here is a (not so great) shot by me with ISO 800. Look at that ceiling. Yikes. And
that one here is what horrors ISO 4000 produced. Both were made with the 18-55mm Nikkor kit lens, both at 1/3.5, but the second one was also exposed for a whopping 1/8!
It might just be that the D5400 has a that much better sensor than the D5200, and that's where our confusion comes from. But I haven't used the D5400 yet and can't really comment on that factually.