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Thread: M645

  1. #1
    mrred's Avatar
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    M645

    I have a Mamiya 645 for about 9-10 months now and enjoy the feel of the camera. I welcome change from my Kiev 88cm with my many ultra leaky backs (only objection to that camera).

    My problem with the 645 is a sometimes stiff trigger. It causes me to jerk the camera slightly. Just enough to lose sharpness. What I don't understand is sometimes the trigger is quite smooth. I also have a motorwind unit for it and it suffers the same fate. I was hoping the the consistent trigger motion would solve this.

    Is there actually something wrong / worn? Is there an adjustment or something I can do?
    Get it right in the camera, the first time...

  2. #2

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    How are you triggering the camera---directly on the body, or is there something in between (like the auxiliary grip, or a cable release) that might be the source of the problem?

    -NT
    Nathan Tenny
    San Diego, CA, USA

    The lady of the house has to be a pretty swell sort of person to put up with the annoyance of a photographer.
    -The Little Technical Library, _Developing, Printing, And Enlarging_

  3. #3
    mrred's Avatar
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    I have used a cable release just to see if it was just how I struck trigger....same problem. I normally directly use the trigger, but I will use the winder if I go somewhere....
    Get it right in the camera, the first time...

  4. #4

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    It isn't a problem I've experienced with my 645, anyway. It sounds like something wrong somewhere in the linkage.

    -NT
    Nathan Tenny
    San Diego, CA, USA

    The lady of the house has to be a pretty swell sort of person to put up with the annoyance of a photographer.
    -The Little Technical Library, _Developing, Printing, And Enlarging_

  5. #5

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    I only had a M645 for a short time but doesn't it have 2 shutter release buttons. One on the front by the lens and one on top by the viewfinder. Try the other one and see if it's smoother.

    Sounds like a CLA is in order.

  6. #6
    mrred's Avatar
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    the only other button on the top is battery test button. Maybe you had a different model.
    Get it right in the camera, the first time...

  7. #7
    adelorenzo's Avatar
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    There should be one shutter button on the top of the camera and one on the front which is the one that takes a cable release. Also, if I remember correctly the front shutter release has a locking ring. Maybe check that you don't have that partly locked?

  8. #8
    mr rusty's Avatar
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    There should be one shutter button on the top of the camera and one on the front which is the one that takes a cable release
    M645J doesn't have thetop release. Sure this isnt just the mirror slap when the mirror releases? it is a bit heavy, but occurs after the shutter is fired.

  9. #9
    mrred's Avatar
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    It is the M645J.

    adelorenzo: I double checked the lock. Free and clear

    mr rusty: I got used to mirror slap and weight from my Kiev. The shake is from me polling to the right caused by the stiff button. On a tripod fired with a cable all is fine.
    Get it right in the camera, the first time...

  10. #10
    mr rusty's Avatar
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    stiff button
    Yes, obviously something not quite right. Mine is really light. perhaps it's been knocked at some time and has a very slight bend in it? If all looks straight, I would probably try a little light oil to see if it helps Is there any gunk around the shutter at all?

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