Thus, all of the tilt brackets will tilt in a synchronized fashion, and {HEAD ~ the angle} of the light path of the microscope housings with respect to the common vertical axis of all of the microscopes will change {TAIL ~ the same amount} 
change
Thus , all of the tilt brackets will tilt in a synchronized fashion , and { HEAD ~ the angle } of the light path of the microscope housings with respect to the common vertical axis of all of the microscopes will change { TAIL ~ the same amount }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL