Hi Joe,
Which raises the question; "How to mount it on the camera/standards perfectly square ?" ... Isn't that a chicken and egg situation?
Cheers,
Bart
Bart,
In my experience, there is a certain amount of "acceptable" error, which will be compensated for by things like depth of field and depth of focus.
I've also found that things like flash shoes on cameras and attachments for compendiums on view cameras are pretty well close enough to square to do the job.
If your needs are such that extreme accuracy is needed, then you really have no choice but to go to a ZigAlign system or something similar.
I know that there will be the inevitable responses about specs, figures, complex math and charts & graphs to "prove" me wrong, but I tend to be pragmatic about such things and go with the what gets the job done, while maintaining more than acceptable results.
If I described the systems in use at major, internationally recognized galleries and museums I've had the pleasure to deal with, you might just faint