Just bought used pretty good condition pentax 645. First roll I shot it the film rewinded no problem. But the rest ive shot since It doesn't rewind and I've just had to click the shutter another 15-20 times and then I can take the back out with and it is wound up. It never does any rewinding though. Also when I try to do the manual rewind with the screw from the bottom that doesnt seem to work either it just keeps going and going (ive done it for along time) and film is still exposed. The only thing that works is firing the shutter off a dozen or more so times after 15 then it is wound up. I am using brand new batteries to seen alot of people saying things about batteries.
Pentax 645 120 film doesn't rewind after 15 shots
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The film is not supposed to rewind. It advances on the take-up spool, and should be completely wrapped leaving the seal tab protruding. When reloading the camera, the feed spool is relocated to the take up side. You then wet the seal, keeping the exposed roll from unwinding and exposing the film to light.
In case you haven't read it, get a copy of the user manual. It gives detailed instructions for loading, advancing, and unloading the film.
In case you haven't read it, get a copy of the user manual. It gives detailed instructions for loading, advancing, and unloading the film.
Ok I worded it incorrectly when i said rewind i meant advance to the take up spool. Why does the film not advance to the take up spool after taking 15 shots. I have to hit the shutter another 13 times.
MattKing
Moderator
Welcome to Photrio.
Is the camera set for 220 film?
Is the camera set for 220 film?
Deleted member 88956
It is the back that does the 120/220 not the camera itself. There are 220 backs on the market that had been hacked to tell camera it is a 120, except the film pressure plate still being the wrong type. I can't think of any reason to hack a 120 to make it act as a 220 though, but possible all the same, same trick.
I believe that what Matt meant in his question Is it a a 220 back that is still set to 220? In Pentax inserts there is a way to alter a 220 back to act as if it was 120 but unless the user knows what he is looking for the change in setting is not obvious. Had I just received a new-to-me P645 I might have expected it to wind on after 15 shots. However I admit that if the OP has a 220 back that is still set for 220 then why did it successfully wind to the end the first time when he only fired 15 times?
It just seems strange that that another 15 shutter operations successfully completes the wind-on.
pentaxuser
It just seems strange that that another 15 shutter operations successfully completes the wind-on.
pentaxuser
Don't know if this helps...
https://www.photrio.com/forum/threads/winning-the-e-bay-game.106567/
https://www.photrio.com/forum/threads/winning-the-e-bay-game.106567/
Can you explain why this helps the OP with a specific wind-on problem with a P645?
Thanks
pentaxuser
MattKing
Moderator
I probably should have worded the question as: "Is the camera set up for 220".?
I have never used any of the Pentax 645 SLRs, but my recollection was that they use film inserts.
I couldn't remember whether the inserts were switchable between 120 and 220, or whether you needed to have separate inserts for each of 120 and 220, or whether the inserts could be fudged to permit using 120 in a 220 insert.
Perhaps the Pentax 645 users here could advise the OP how to identify which type of insert is installed in his/her camera?
I have never used any of the Pentax 645 SLRs, but my recollection was that they use film inserts.
I couldn't remember whether the inserts were switchable between 120 and 220, or whether you needed to have separate inserts for each of 120 and 220, or whether the inserts could be fudged to permit using 120 in a 220 insert.
Perhaps the Pentax 645 users here could advise the OP how to identify which type of insert is installed in his/her camera?
The OP needs to tell us if the Pentax 645 has a 120 or 220 insert. Sounds like he has a 220 insert, or the insert is signalling the camera that it is a 220 type. The difference is discussed here:
https://www.photrio.com/forum/threa...etween-120-and-220.160057/page-2#post-2082024
Plus it should say 120 or 220 on the back.
Or someone could have inverted the little plastic indicator shown on post #6
https://www.photrio.com/forum/threa...etween-120-and-220.160057/page-2#post-2082024
Plus it should say 120 or 220 on the back.
Or someone could have inverted the little plastic indicator shown on post #6
God point Matt and this may be the start of finding the cause or at least eliminating what is not the cause. On this site GRHazelton is very knowledgeable. I only have 120 inserts and frankly don't have access to the before and after pictures that illustrates the difference which I think GR does but I can say that when I Iast saw these pics the difference was extremely subtle.
It may help the OP to go to the Pentax forums and join it. Membership is free. He needs to look at the Medium Format section and find a very long thread on I think "conversion of 220 backs to 120" or some such title. From what I can recall there were pictures in that thread that may help
pentaxuser
For
Pentaxuser, please correct me if I am wrong but I believe these film sensing contacts, like the Rolleiflex, need a wire (which could come lose) to make a complete circuit.
Deleted member 88956
P645 uses purely nechanical means to tell camera which insert is in as shown in early post with pics.
My question was about the link you provided as this seems to be about the range of good for fortune and bad fortune experienced with e-bay purchases. Was this the link you meant to provide?
Thanks
pentaxuser
It's been several years since I've own a P645, but I believe there are 2 electrical contacts on the left side of the insert that tell the camera that there is film loaded, which is sensed by those feelers that stick out through the pressure plate..
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See #6 above.
Deleted member 88956
Not sure what those two do, but film insert has side tab to tell body 120 or 220, so with 220 it will continue to advance film by single frame past 15. As in post #6, tab can be flipped on either insert so technically either one could be used for either film. Trouble starts with pressure plate being of different thckness, but that is another story.
So, jmacy9109, any luck with any of our ideas? Always nice to hear if our contributions bear any fruit
pentaxuser
pentaxuser
The thread linked was supposed to be about this repair of a Rollei 6008 film back that would not wind up after the last shot. This wire to the film sensor had come loose. After re-connecting, it has worked flawlessly.
This is when loading the film I suppose, not when 15 frames have been shot.
Btw I didn't selected the right photo I had in mind. Correct is : 120 is on the left and 220 on the right.
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