Question about Mamiya 645 Medium Format Camera

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Mamiya M645j film counter not advancing to start when roll loaded

I have an M645j that's having a problem where the film counter does not automatically advance back to the start when a new film cartridge is loaded.

I've heard that it could be a spring somewhere that's not working right, and the film counter otherwise works fine when I wind the gear back to the start with my finger manually.

How can this be fixed? Thanks

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  • Anonymous Feb 27, 2009

    same

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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.

Posted on Jan 08, 2009

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Posted on Jan 02, 2017

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1 Answer

Mamiya RB67 Pro S: film counter does not advance, but the film does advance purchase another back same problem. Is there a switch that I'm missing??


If the problem is on the magazine's counter and if the spacing of frames is correct then the counter dial is loose. two screws on the outside front of the top of magazine, two screws in the film chamber hold the top cover. remove leather cover on winding lever loosen screw and remove. you can then remove the complete top housing to expose the counter mechanism.

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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

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My Mamiya C330 Pro only gives me 4 photos per roll


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, Matt

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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.

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My Pentax SPII shoots blank images


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Rewinding but counter not resetting and light meter dead? Prolly bad connector or ic inside camera = repair shop.

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1 Answer

Film won't advance


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