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

Yes, Backes, we can be sure the DPD motorcycles were all uniform, so the distance from windshield to rider was the same on all of them. 

I thought that went without saying. 

And I know about depth perception, and I realize that nearer objects appear larger in the picture. But, even with that considered, the distance between the windshield and BJ Martin (were he present in the picture) is too great. 

 There is no point in talking about f-stops because Mary Moorman made no such adjustment. Whatever the standard was on the Polaroid Model 80a is what she used. Remember what she said: 

"We were not a photographic family. We just raised the camera and took pictures." 

So, Mary didn't zoom; Mary didn't change the F-stop. She did turn the device to focus, and I presume she focused on the Kennedys. But, what does that have to do with what we're talking about? The distance from the windshield to where Martin had to be was too far. The capture of the right arm alone of BJ Martin is bogus; she could not possibly have caught so little of him. 

That is impossible, Backes, and I am going to Dallas to prove it. I am going to take so many pictures in so many different ways, and you'll see that none of them come anywhere close to what we see here. Nothing that I do, including sacrificing the overall field of the Moorman photo, is going to enable such a thing. From five feet high and six feet away, it will be impossible to catch just the right arm of a passing rider.