Frames sometimes only partly advanced

[Daneinbalto]

I have now run 2 films through my new to me (bought refurbished from R&H) ZI. In both cases, one of the film's frames was only two-thirds advanced, resulting in two ruined pics. When it first happened I though I might have inadvertently touched the rewind release button. That was definitely not the case the second time. The same thing happened to me with my Oly XA that I bought a few weeks earier. With the XA I thought it was a result of camera wear. I have never had anything like this happen to me during 20 years of Oly OM shooting.

I am wondering if I am not careful enough when loading film on my new cameras, which have a different spool design than the OM. Maybe the leader is not inserted properly into the take-up spool. Or is a tendency to partially advance a frame a common defect on cameras that has appeared unexpectedly early on my ZI?

 

[mirrored]

Maybe the leader is not inserted properly into the take-up spool.

I think it's not (never or normally in common cameras) a take-up spool which give proper advance to film but two teethwheels before it. Always take a careful look to teeths properly fitting to film side holes before closing the backdoor (if unsure, use extra advance or/and tight film from left, from cassette side)

Or is a tendency to partially advance a frame a common defect on cameras that has appeared unexpectedly early on my ZI?

I cannot believe common. Never met during my 30 years experience.

 

[mirrored]

What is? Perhaps you had closed camera door without proper film fit to teethweel and then during your filmroll happen ones a partly advance because film find its right place?