Question about Mamiya RB67 Pro SD Medium Format Camera

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Pro-S film back doesn't advance film properly.

I have a film advance problem with a 120 Pro-S film back for the Mamiya RB67 ProS. I cannot advance film unless the multiple exposure lever is engaged and I push the film wind-stop release to the left. When I load film, to the #1 exposure position, the red mark on the counter does not go away as it is supposed to forcing me to have to resort to this work-around and then I never know if the frame was exposed or not. Any help?

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There is good chance that the back needs a spring replaced. I've seen them fail many times.

Posted on Dec 07, 2009

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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.

Oct 30, 2013 | Mamiya Rb67 Pro S Medium Format Camera-...

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Film-advance warning won't go away on a RB67 Pro SD 120 film back?


Mamiya RB67 Pro SD that is new to me. loaded the film correctly took the first shot. But, the film won't advance. What am I doing wrong?

Feb 18, 2012 | Mamiya RB67 Pro SD Medium Format Camera

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May 31, 2010 | Mamiya RB67 Pro SD Medium Format Camera

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Hi there, my pro-sd 120 rfh has stopped winding on film. the lever just spins freely with no resistance. I am wary about opening it up in case any tiny springs go walkabout. can anyone advise me, or even...


Sounds like the film has come loose. Either it's not properly loaded or it has cut. Try to open the camera in a dark room and feel your way thru the inside of the film track to assure the situation.

Nov 18, 2009 | Mamiya RB67 Pro SD Medium Format Camera

2 Answers

My Mamiya RB67 triggers and shutter lease lever works but film advance lever doesn't move. Trigger button fired several times but film advance still showing 1.


This is not the best solution as it indicates a faulty film back. The film should advance without resorting to activating the film-wind release lever. That is only for intentionally advancing a partially exposed roll of film. Make sure the multi-exposure lever is not engaged and that the counter does advance and the red mark disappears as you advance to an unexposed frame.

Nov 09, 2009 | Mamiya RB67 Pro SD Medium Format Camera

1 Answer

Shutter will not trigger when film back is attached, only when it is off


Did you made sure the dark slide was removed? Check to see that the firing pins on the camera back are coming through the revolving bracket okay and that they are engaging the pin on the film back (left side). Is there film loaded? You can check without film if you have the multi-exposure lever engaged (red spot visible) and dark slide pulled out.

Nov 06, 2009 | Mamiya RB67 Pro SD Medium Format Camera

1 Answer

Mamiya RB67 ProS wont trigger or advance


Start by making sure the dark slide is removed, the camera will not fire with it in place. The next step is to check the rotating back to make sure it is locked in either the vertical or horizontal position. Without film in the magazine, the multi-exp lever on the back must be set to show the red dot under the advance lever. You can check the camera without the back by removing the rotating back using the latch on the bottom of the camera

Nov 25, 2007 | Mamiya RB67 Pro SD Medium Format Camera

1 Answer

Film won't advance


Perhaps you've already solved the mystery. There are 2 parts to the back of that camera, the film back + the part that it slips onto. And they have little safety latches/pins that couple in order to advance the film & release the shutter. I'm sure those just aren't in the right place. Here in Los Angeles you could take it to any major camera store or repair shop & they've help you out.

Mar 06, 2007 | Mamiya RB67 Pro SD Medium Format Camera

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