[gandalfu]

For comparison, here is the view from the Empire State at night with 30s exposures.

Not only his pictures are visually stunning, but also incredibly difficult to capture.

https://www.flickr.com/photos/63499655@N02/sets/721576298051...

[morcheeba]

That's 30 seconds at f9 at ISO 100. They were shooting at 3200-6400, at f1.4-2.8

Counting down, that's 30/100, 15/200, 8/400, 4/800, 2/1600, 1/3200 ... so same aperture cuts it down to 1 second.

Then increasing the aperture 1/f8, 0.5/f5.6 0.25/f4 (1/8second)/f2.8 (1/15second)/f2 (1/30second/f1.4).

That's still difficult to capture, but a wide lens and/or image stabilization will help. Getting all 50 megapixels sharp would be hard to do.