Chaney's motorcycle in Zapruder frame Z-242

[Royell Storing]

     The motorcycle headlight says it all. Move Officer Chaney backward and his headlight is obstructed by the JFK Limo. Well, unless you also move Chaney to the extreme North.  This is where that Altgens Photo has placed those die hards that refuse to admit they got it Wrong for decade after decade. When do we get to the point where they claim Chaney hit something in the road and bounced his motorcycle cycle 1 foot straight up? Ridiculous in the face of the Altgens Photo.   

[Walt Cakebread]

Paul, when determining a line of sight you take objects that line up vertically in the foreground and background and plot them from overhead. From overhead it does matter what height anything is. It also does not matter how long the bike is. you only use a single point like Chaney's helmet and whatever single point is directly above his helmet in the background. If you want to find the location of the headlight you don't need the length of the bike, you just do a line of sight for the headlight itself.

when determining a line of sight you take objects that line up vertically in the foreground and background and plot them from overhead. From overhead it does matter what height anything is.

when determining a line of sight you take objects that line up vertically in the foreground and background ( just like aiming a rifle) and plot them from overhead. From overhead it does (not) matter what height of anything is.

In the case of the Altgens photo it's obvious that the west corner of the concrete pylon  aligns with the center of the third window (from the SE corner of the TSBD )  Thus you can use the center of the third window as the anchor point for a line that runs through the corner of the pylon and on to the triple underpass. Since the hood ornament of the Lincoln falls on that line it's possible to locate the Lincoln on Elm street at the time the photo was snapped.

[Walt Cakebread]

In Altgen 6 the Zoom lens makes it appear as though the TSBD doorway was right next to the white concrete column.
In reality the doorway is some distance away from the white column.

No the TSBD entrance does not appear to be beside the pylon....It appears to be in the background .....


 

[Walt Cakebread]

In Altgens 6 the Zoom lens males it appear as though the man in the suit was standing next to the woman and child, and that they were standing just behind the white column.

They were NOT standing together, and were not just standing behind the white column.

Robin, What is that dance you doing called?

[Royell Storing]

No the TSBD entrance does not appear to be beside the pylon....It appears to be in the background .....

    Anyone that looks at that photo and believes they are seeing the pylon beside the TSBD needs to have their peepers checked out. Maybe this Peeper Problem explains the erroneous interpretation of the Altgens photo. Then again, maybe they are just afraid to Admit they cavalierly rubber stamped an erroneous Claim for decades?

[Walt Cakebread]

    Anyone that looks at that photo and believes they are seeing the pylon beside the TSBD needs to have their peepers checked out. Maybe this Peeper Problem explains the erroneous interpretation of the Altgens photo. Then again, maybe they are just afraid to Admit they cavalierly rubber stamped an erroneous Claim for decades?

In medical terms....It's called Crainialrectalitis.......

[Royell Storing]

Robin, What is that dance you doing called?

      I think he should call it the "Zoom Chicka BOOM".  The "Boom" is his head exploding as he melts down with his numerous photogs using numerous Zoom lenses excuse. Sad

[Andrew Mason]

Regarding Chaney's hand seen through the window.
we can also clearly see the black mans white shirt and black trousers.

Man (1) is atanding on the sidewalk
Altgen 6 / Croft Credit: Martin Hinrichs

Altgens Zoom lense makes things in the backround appear closer than they really are.

The sightline from Altgens to the corner of the concrete pillar east of the lamp post passes over the hood ornament on the front of the limo.  Chaney is north (left) of that.  It seems to me that your drawing has misplaced either Altgens or the limo or both:

There were two motorcycle riders on each side. Chaney and Jackson were to the right (north) side of the motorcade.  In Altgens, we can only see one. Where is the other one? 
We can see a motorcycle front wheel pull up to the side of the president's car in z307 (sprocket area below z307 appears as double exposure at top of z308).  Do we know that that is Chaney?