They've added more shaft sections since that photo was taken. Crane shaft pieces are supposedly 20 feet tall each. I can count at least 6 of them above the top of the building now, plus the crane boom itself and swivel base. So, it's probably around 140 feet above the top of the building now. So I'm guessing the crane now is probably within 20 feet or so of where the building will top out.
https://www.workzonecam.com/projects...nt/workzonecam
The top of the building now is at the 49th floor - 528 feet, and is 151 feet above the 35 floor. The 35 floor is where that large setback is on the east side of the building.