Quote Originally Posted by paul ron View Post
I think the engineer was asking if the testers were ever compared to a known source or standard to calibrate the "machine" as accurate to a tolerance?... not asking if the shutter measurements are within tolerence, but the actual test machine itself is within a measurable tolerence.
No, I meant how close the measured shutter speed is to the marked speed on the shutter speed dial, and what margin of error is acceptable, i.e. if the marked speed is 1/1000sec and the measured speed the unit is operating at is 1/807sec,or 1289 sec, is this acceptable or not, what is the acceptable margin of error before the the shutter is sent for re -calibration.