Rebel with a bust (egad--did I really title this that?)

It's fairly common knowledge that part of Rebel Without a Cause was filmed at Griffith Observatory. And it's not exactly a secret that there's a bust of James Dean on the grounds of the observatory commemorating that connection.

With these two shots of said bust, notice how in the relative size of the background (the Hollywood sign and transmission tower) to the size of the bust shrinks from the shot at the right to the shot below.

Behold the glory the zoom.