Question about Mamiya 645 Medium Format Camera

1 Answer

Shutter stays open on mamiya 645 M

I did not use this camera for some time .battery was left in [dumb] I replaced batt. and loaded film shutter opens but will not close until I push down on batt. check button .The i noticed new batt. was comletely drained film ruined of course.No big deal but what could be wrong and what can I do to fix? Nick

Posted by on

  • 1 more comment 
  • Anonymous Feb 06, 2009

    I have the same problem. Is my shutter busted or what?

  • DanB58 Feb 14, 2009

    Im having this same Problem .. I found if I hit the crank with a sharp blow in the palm of my hand it releases the shutter .... any ideas? Seems this is a common problem and there must be a fix ...

  • Anonymous Apr 05, 2009

    same problem


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 981 Answers

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.

Posted on Jul 31, 2008

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add


Mamiya 645 Medium Format Camera Logo

Related Topics:

318 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mamiya Instant Cameras Experts


Level 3 Expert

96738 Answers


Level 2 Expert

135 Answers

Ric Donato

Level 2 Expert

225 Answers

Are you a Mamiya Instant Camera Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides