[quotei understand that 16 shot requires a perfectly still camera etc but i am still having trouble. my question is does the back have a calibration function? thanks for any help
Yes, the Eyelike M-series did have a calibration chart that was included with the back. However, it was extremely rare that it was ever needed.
What camera are you using?
Are you on good solid tripod/monopod?
Environment is rock-solid (no trains, etc)?
Subject matter is rock solid and not affected by even a slight gust of air from movement?
I've found that generally, the only cameras that work well with 16 shot exposures are electronic cameras (Hassy H1, Mamiya 645AFD, with mirror locked up, or view cameras with electronic shutters.
You can contact me offline if you like.