In article , WBELL@bss2.umd.edu says...
(most deleted)
>Rather than Spamming the guy, lets try to be helpful. The more likely
>problem is that his camera needs to be collimated. With normal lenses >a slight error is likely to be not noticed, but with a 300mm lens wide >open the dof is small enough to magnify errors. (....)

I think this is very unlikely. Teles have less DOF, but greater
(visual) depth of focus (I know David Jacobson will holler about
this, and technically, any lens [of standard optical construction] defocused by the same physical dimension will have equally large
circles of confusion at the same aperture, BUT, the viewed images
will differ, with the tele producing a more nearly sharp looking
image than the wide lens), so, if there had been a body problem
(on ALL of their bodies???), it would have been more obvious with
their shorter lenses, not the longer.
Hope This Helps