Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

Look at the freeway sign in the Betzner photo. Get a sense for the size of it and the angle of it. Also, be sure to observe Zapruder up on the pedestal. 

Now, here it is in the Zapruder film.

The most important thing is to determine the angle of the sign to the street. And we know what angle it was: 90 degrees. And that's how it looks. That's the most readable angle for street signs. 

But, the angle to the street is much less in the Zapruder film. It is facing the street more. 

So, which one is real? Betzner. The sign in Zapruder is bogus.