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

So, she didn't click it at Z-292:

And she didn't click it at Z-300, which is what this was:

And she didn't shoot it at Z-305 because Jackie is still too high and too close to JFK. And for some reason, Jean Hill is looking the wrong way, and even Mary doesn't seem to be aiming her camera at the Kennedys.

Wouldn't she be turned towards the Kennedys if she was shooting them? Doesn't it look like she is shooting straight ahead?

And she didn't shoot it at Z-310.

 Again, that can't be the Moorman photo shot because Jackie is still hovering over JFK. The two of them are very huddled together here, unlike in the Moorman photo. And again, doesn't it seem like Mary is not aiming her camera at them? Shouldn't she be turned towards them and pointing the camera at them? 

Finally, here is the last Zapruder frame showing Mary Moorman, just barely, and it is the one in which Officialdom says she finally clicked her camera, Z-315.

Personally, I think Z-316 is the better pick because it's the better match, but I can live with Z-315. At least we can see that she would have captured the motorcycle cop in the picture, as seen in the Moorman photo. 

So, let's say they are right about Z-315 being when Mary took her picture. Why, if she had a lock on JFK since Z-292 (and maybe even before that) did she wait until Z-315 (when he'd already passed her) to snap the picture? Who does that?