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

Here's another reason why this frame of Backes can't possibly be the one at which the Moorman photo was taken.

Let's hone-in on JFK and Jackie. 

We can see very little of JFK's head in this one, but that's it there in the brown.  Just compare that to the others. 

Above, they are too far apart to correspond to the Moorman photo. What happened is that JFK went slamming back into her from the "back and to the left" movement, and I believe she was startled. And she got out of the way. Above, they are too far apart. In earlier frames, they were too close together. For example, here they are in Z-312 which was one frame before the fatal head shot.

On the left, Jackie is too high. Can't you see she's lower on the right? She's also too close to him. Can't you see she's farther away on the right? I really think that Z-316 comes closest to matching the Moorman photo.

That is the money shot right there. But this?

No, no, no. That top one isn't it. This below is NOT when the Moorman photo was taken, because of that, because of Clint Hill being in the picture, and because of the misplacement of the motorcycle cops, who are too close to the Kennedys. 

If you're going to do this, you have to be painstaking and detailed. You have to look at it the way a radiologist looks at an x-ray. Do you have any idea how fine and subtle the observations of a radiologist can be? It's amazing what they can see.