No the camera lens doesn't make much of a difference at all. Most of the Distortion is not in the center of the lens. Distortion can bend things but it will not make one object appear behind another falsely. You do have to make sure the photo is rotated to level though. But you don't really need multiple lines of sight other than the line of sight through the limo. For instance where does the front of Nellie's window line up with the far side of the limo. As I recall it lines up with the sun visor on the shotgun side. Draw a line from exactly where that window wines up underneath the sun visor and extend that line to the point on Nelly's window you were using. If you do that on an overhead diagram or picture of the limo, you will have the angle at which Nix was relative to the limo.
Uh, ok.
"Distortion... will not make one object appear behind another falsely."
Uh, I guess you've got some "target fixation" going on.
And disproving the fact of Nix/Zapruder non alignment is your target.
Let's recap: you cite Roberdeau's "map. You say this "map" tells you Nix's location. And the angle at which Nix is shooting from.
I point out that there are no photos/films to document Nix's location.
So, how do you know what the angle is?
You double down and tell me line of sight? And that the camera lens is unimportant? So, are changes in elevations unimportant? Do you conduct land surveys with a super 8 camera?