Every so often when getting the developed film back the centre of the photo is slightly out of focus. It seems to be a random occurance as the shots either side are usually perfect. This is useing the 80mm af lens. Is this a lens problem or camera one? Anyone had similar problems?
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If you find a source, do share. I am looking for the shutter stop to be fixed on my Mamiya 645 Pro TL as well. I saw someone online made one out of metal himself... seems like the way to go, but lot of effort.
From the manual:
"If the error display is not canceled when the shutter release button is pressed again, insert the Dark slide, half-press the shutter release button while pressing the roll film holder's manual film advance button to wind up the film, then contact your nearest Mamiya agent or service center."
If you need a manual, you can download one from http://butkus.org/chinon/mamiya/mamiya_645af/mamiya_645af.htm
Sounds like either a battery issue, or an issue with electronics. I'd first try checking/cleaning any electronic contacts between the body and the back. If that doesn't help, if you have access to another back try that to see if the issue is in the back or in the body (or both?). If that doesn't narrow it down, send the whole kit in to a service center or take it in to a local tech if you have one.
A few things to consider:
-Loading: Make sure you are not over loading the film before you start to shoot. I have sometimes turned the film advance too many times and end up cutting down on the amount of usable film.
-Are you loading the film in a dark area and careful to close up the back just after it has started to load to avoid exposing it?
-Shooting: Are you metering properly when shooting? Obviously underexposed images won't develop. You should consider a hand held meter.
-Shooting: Are you advancing the film more than it needs to be after you take your shot? Watch the film counter and feel for that click as it hits the next frame. I have advanced past the next shot many times by accident.
Hope that helps,
First thing that comes to mind on this camera is that it's a modular camera. This means the film back can be changed mid roll so there is what is called a Dark Slide between the film back and the body.
The dark slide needs to be removed before the camera will function. Also depending on how "new" the film back is there may be a dark slide holder/sleeve on the back side of the film back.
So you remove the dark slide and slide is into the holder so first you don't loose it and also it doesn't get bent.
The battery in the film back is only used to supply power when the back is off the camera, when it is on the body power is supplied by the six batteries in the body so try them and also make sure the film insert is properly seated.
It's a common problem in the 645 - if you want to do it yourself, without a permanent fix, put a DROP ( not a lot ) of lighter fluid, or rubbing alcohol on the tip of a fine screwdriver and apply it to the gear you use to rewind the camera, and turn back and forth a few times. If that doesn't loosen it, it'll have to be disassembled.
Get any crud from the battery out of the works with pH-neutral stuff and q-tips or lint-free towels, and see if it works (without film; might as well check current drain with a bench supply instead of a battery, too) once you've done a satisfactory job of that. Then visit a shop so they can see if the shutter timing is tolerable...and perhaps sometime you can load film in again.