RB67 Pro-S red frame lines

Discussion in 'Medium Format Cameras and Accessories' started by tomalophicon, Mar 9, 2011.

  1. tomalophicon

    tomalophicon Member

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    Hello,

    Does anyone know anything about the mechanism that operates the red bars being moved up and down when you rotate the back?
    Mine isn't working and I can't work out exactly what triggers them to move.

    Thanks,
    Tom.
     
  2. Athiril

    Athiril Subscriber

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    Take off the revolving back.

    It's the smaller hole on the right hand side, half way down the right hand side of the rear of the camera, ie: there are four holes around the camera, 2 on either side, the right pair has one in between them, press down into that with something, that pops up the red lines when in landscape mode.

    On the revolving back there are four corresponding notches for those four holes.. so you should see the pin that engages the red line hole between two of them on the left (when facing you, on the right when facing back of cam).
     
  3. tomalophicon

    tomalophicon Member

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    Thank you very much for that.
    Cheers.
    Tom.
     
  4. paul ron

    paul ron Member

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    Is your revolving back an RB Pro-S? Only the Pro-S or newer model rev backs will activate the red bars.

    Rb Pro-S rev back has 2 chromed silver tits, the others have on only one.
     
  5. tomalophicon

    tomalophicon Member

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    Paul, I'm not with the camera at the moment (a sad time indeed) but I'm pretty sure it's a Pro-S revolving back. I'll double check.

    Any ideas other than that why the bars aren't being activated?
     
  6. Athiril

    Athiril Subscriber

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    the chrome bar is missing (Pro revolving back), the chrome bar is broken off. Or the button is missing/broken which seems basically impossible. Or your red bars may be missing
     
  7. paul ron

    paul ron Member

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    If it is a Pro-S rev back, check to see if the mechanism that activates the red bars is not hung up or the pin broken or bent. The bars are moved as a ramp sends a pin into the body which actually moves the bars via an internal lever. It can be the body that needs some lube to get the bars moving, not the back.

    I don't have a a back in my hands to give you accurate details on how to check it. I'll get back to this a bit later tonight.
     
  8. tomalophicon

    tomalophicon Member

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    Cheers Paul, I'll have a look tonight.
     
  9. paul ron

    paul ron Member

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    With teh rev back off... On the right side of the body is a hole. Insert the end of a Q-Tip and tht should more the red bars. Now look at the corresponding place on tehrev back, there should be a pin that mate with teh hole... see if the pin comes out as you turn the back?
     
  10. hpulley

    hpulley Member

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    Take the focusing screen out and take a look and see if you have red bars in the body at all, if they try to move when you rotate the back or just sit there.
     
  11. tomalophicon

    tomalophicon Member

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    Yep that was the first thing I checked and they are there. There is tension on them too.
     
  12. Athiril

    Athiril Subscriber

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    How is it?
     
  13. tomalophicon

    tomalophicon Member

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    OK I poked a shoelace end in the body and the frame lines came up nicely.

    On the revolving back, I found the mechanism which looks as though it has something snapped off the end of it. It basically looks like one of those little allen-head grub screws with a hollow end. If that makes sense at all.
    The spring below it appears to be in the pushed in position but the little noggin is barely coming above the surface of the back of the RB adapter.
    Any ideas? A new revolving back adapter?

    EDIT:
    I can also fire the shutter in landscape orientation (which shouldn't happen without the multi-exposure interlock) and not in portrait orientation.
     
    Last edited by a moderator: Mar 10, 2011
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  15. paul ron

    paul ron Member

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    You can continue using it as is, as long as you don't mind.

    It fires n has no effect on the image?... that is basically what we need most in a camera, the rest is gravy.

    Shame to waste a rev back, I know a few bodies that can use one in any condition.


    .
     
  16. tomalophicon

    tomalophicon Member

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    Yeah, I don't really mind but it's a pain because I know I won't remember the orientation of the back.

    Nope images are Ok but the revolving back seals are shot. If I get a new one I'm happy to send you this one if you're interested.
     
  17. paul ron

    paul ron Member

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    Thank you very much, I do appreciate the offer but.....

    ALLLLLL the way from therrrrrrrrrrrrre? Postage will cost as much a new one.

    Maybe someone in your area can use one?

    To remeber the orientation of the back... put a red dot sticker on the top of the back so you know when you are in portrait mode. Also cocking it on it's side should be enough of a reminder.
     
  18. tomalophicon

    tomalophicon Member

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    That's a good idea Paul. Thanks. Or maybe I can repair it and use it instead of buying a new one.
     
  19. tomalophicon

    tomalophicon Member

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    OK, looking at this pic: [​IMG]

    My little noggin thing is definitely snapped off.
     
  20. paul ron

    paul ron Member

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    What noggin thing is snubbd off? Isn't the pin in the middle on the side the one for the red bars? That's the one that fits in the hole you activated the bars with.. correct? The mechanism works by running it up a ramp inside the halves if you look inside as you turn it. Yes? Does tha pin go in n out freely?
     
  21. tomalophicon

    tomalophicon Member

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    Paul, that pin on the side isn't there! It's basically broken at the base (by the looks of it).
     
  22. paul ron

    paul ron Member

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    The pin at the hole is missing? I see on the left side of you pic 4 pins, the one in the center isn't it?
     
  23. paul ron

    paul ron Member

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    My most recent post dropped off here on refresh...

    The pin that should mate with the hole is missing?

    I see a pin on the left side of your pic in the center... isn't that the one tht mates with the hole?
     
  24. tomalophicon

    tomalophicon Member

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    Paul, sorry this pic is off the internet. This looks like a complete adapter.

    The one I've got has no pin, or atleast it's sheared off at the surface of the adapter.

    I just posted this pic to compare mine to and the pin is definitely not there on my example.

    Thanks,
    Tom.
     
  25. paul ron

    paul ron Member

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    AH HA! Now I understand.

    That's not your dog, so of course yours doesn't bite.

    Well that's a shame. I wonder how it got sheared off? Are you sure it';s not hiding inside? At least you can still use it. I'd just live with it, not worth fixing.

    If I ever come into a part, I'll definately send it your way.
     
  26. tomalophicon

    tomalophicon Member

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    Hehe sorry for all the confusion Paul.

    Not sure how it did, it's new to me so its history is unknown.

    I may be able to attach another pin fashioned from something from the hardware shop or something. I'll see what I can do.

    Thanks for the offer, I'd be keen for that :smile: