Mamiya RB67 Pro S back counter issue

MichaelMcC · Oct 28, 2023

Hi all,

Have a very odd little issue that I thought I would see if anyone recognised. When I take a shot in landscape, the red exposed indicticator appears in the counter and I can wind on as normal. However, if I switch to portrait mode, once I take a shot the red indicator does not show and wind on is locked.

If I flick the release button (top centre of the back) red indicator pops up and I am able to wind again. All back to normal.

It's not the end of the world as its still all workable but I thought it was odd. Anyone else heard of this before?

(It's a Pro S back)

Cheers

Michael

Marco Gilardetti · Oct 31, 2023

No not really. However, as you possibly know, the red dot is triggered by a pin that is "fired" out in a corner from the camera body. One thing I may think of is that something is locking off the pin when the back is in portrait mode, and not when in landscape mode.

MichaelMcC · Oct 31, 2023

That's really helpful, thank you! I'll try a check for this. Could be a stuck or bent pin alright. Maybe disassembly and reassembly might clear it. Will let you know results once I try. Cheers.

pamphoto · Nov 5, 2023

Hi Michael. I have been having the same issue with some of my Mamiya backs. It is rather frustrating and I have lost a few frames fighting with it.
I'll take a look at my pins too

MichaelMcC · Nov 7, 2023

pamphoto said:
Hi Michael. I have been having the same issue with some of my Mamiya backs. It is rather frustrating and I have lost a few frames fighting with it.
I'll take a look at my pins too

Hi Pam, I have ordered another back. Hopefully that is the problem and not the revolving back itself. I’ll let you know once it arrives. Landscape mode until then

MichaelMcC · Nov 9, 2023

Marco Gilardetti said:
No not really. However, as you possibly know, the red dot is triggered by a pin that is "fired" out in a corner from the camera body. One thing I may think of is that something is locking off the pin when the back is in portrait mode, and not when in landscape mode.

Hi Marco

I took the revolving back off and on again a few times and rattled the left hand side (looking from the back) pin afor a while and result! Red indicator coming up now every time in landscape and portrait. Thanks a million!

Marco Gilardetti · Nov 10, 2023

Excellent! Very happy of having been of some help!

Mamiya RB67 Pro S back counter issue

MichaelMcC

Marco Gilardetti

MichaelMcC

pamphoto

MichaelMcC

MichaelMcC

Marco Gilardetti

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