Roscoe White and the DPD were behind the BYPs. Roscoe was no stranger to shenanigans in the darkroom. The BYPs were part of Oswald's sheep-dipping and the DPD's aim was to leak a photo showing Oswald with the alleged murder weapons and commie lit. The reason the scope was left on the rifle was to match the BYPs, otherwise, it was more than useless to an assassin and when did Oswald wipe off all his prints from the rifle? Also note that only CE 133A was good enough quality to read the heading on the commie lit.
The DPD have so many incriminating connections to the BYPs it's just more Keystone Cops from them. From their backyard "re-enactments" to their darkroom cutouts from a negative that appeared out of no where and was never admitted into evidence. This one stinks from the way the DPD collected the evidence to the eventual leaked photo CE 133A that landed on the front page of Life.
CE 133A is the smoking gun. Its quality does not match the other photos. It's too good and was NOT taken with the Imperial Reflex 620 camera. CE 133A does not have the same lens distortion as the other photos, in particular the "spherical aberration" of CE 133A was not common to all the photos. Spherical aberration occurs outside the "sweet spot" of the lens where the image is in focus and there is minimal distortion. Good lenses have minimal spherical aberration. CE 133A was taken with a good lens. It was the "money shot" and was not taken with the Imperial Reflex camera.
For example, the following blended GIF shows a comparison of CE 133A and C. I tried to match up the background as best I could but that spherical aberration got in the way and stood out like a sore thumb. Note that the differences in distortion between these 2 photos were NOT caused by a simple tilt of the camera.