Audio problem: Nick uses the periscope camera through the grate of the basement floor. There is first a shot of the camera poking out and that is followed by a shot of a hand-held screen accompanied by a camera zoom sound as he zooms. Generally the zoom sound would come from the camera itself rather than the screen and a camera that size is not likely to make a electronic zoom sound of that amplitude.
Question: Why does Norton lie and say that he "has company" and then make De Niro wait longer during the robbery? Sure, Norton double crosses him later, but wouldn't making his partner wait put both of them in danger of getting caught since it delays them and increases their chances of getting caught?