Originally Posted by Huss
I have an old roll of Kodachrome 40 which I use to test film loading of my 'new' cameras that I aquire. I have noticed that after a few rewinds, the film itself becomes harder to load and rewind. Especially load. There feels like there is far more friction, and part of this is it being curled as it is wound round the take up spool. That adds to the torque required to load the film, which may be why you are getting inconsistent results.
Try it with a fresh roll (after you have shot this one) and it should load fine.
They also should slow the load as it gets near to the end. That is to protect the mechanism.
But the OP states that different rolls were loaded for the first three results reported, then loading the same roll gave similarly inconsistent results. My question would be how does the camera "know" it has come to the end of the roll and similarly as you state it slows towards the end, again how is that detected. I would suspect it some form of torque detection, as with your multiple loaded reel.
The same issue was discussed here with no conclusion: http://www.rangefinderforum.com/foru...ad.php?t=89685
However on an Xpan Flickr group the problem is described exactly the same way, perhaps the same user, who sent the camera for service and reported all was well on return: