Thanks, That's very helpful. Our movement is fixed--the excursion of the diaphragm will be controlled by our manual alignment of the camera.
I was worried that pressure would cause "bellying" between the effective ID and OD of the diaphragm, but I believe it won't add enough stress to cause...
A basic question for you pressure guys: Will a diaphragm with convolutions undergo more movement before reaching yield stresses than one with a straight section?
My situation:
I'd like to use a diaphragm to mount a camera onto the side of a custom vacuum dewar to impart some adjustability: +/-...
