The correct term is focal length, zoom is when you change the focal length on a lens. Most of the big lenses can’t zoom as they are fixed focal length.
The focal length of this one is probably 200mm or under, which would mean the photographer used a 70-200 zoom lens. To put focal length in perspective, a lens for normal use is 24-70mm, those big lenses you see at sports games are 300mm or 400mm plus. Some F1 photographers use 600mm or more.
Now the angle it was taken looks like the photographer is standing in the middle of the track. Judging by the order the cars are in, I’d suggest that it was taken on the lap the cars do from the pits onto the grid. The grid is full of people anyway, the cars come in very slowly so it wouldn’t be suicidal to stand on the track while the car is passing. He’s just standing at the back of the grid, which is why only a couple of slots are visible.