Horseman 985 'graflock' & Mamiya rb67 backs?

Discussion in 'Medium Format Cameras and Accessories' started by Leon, Apr 10, 2011.

  1. Leon

    Leon Member

    Messages:
    2,075
    Joined:
    Dec 1, 2003
    Location:
    Kent, Englan
    Shooter:
    Medium Format
    I've just bought a wonderful Horseman 985 mf field camera with the 69 back. It is a really great thing to use.

    I have an old mamiya rb67 back hanging around which I want to use on the horseman. The plastic plates on the interface part of both the mamiya and horseman backs look identical. Without measuring I can't see any differences, yet I cant get the retaining sliders on the mini 'graflock' back to fit with the rb67 back.

    Does anyone have any experience with this issue? Is there a modification that can be made to the rb back to make it fit? I've googled but can't find a definitive answer.

    I can wedge the back in place, and it works ok, but there are a few light leaks so it's not really a solution.

    Thanks in advance.
     
  2. xya

    xya Member

    Messages:
    299
    Joined:
    Jun 13, 2010
    Location:
    Calais, Köln
    Shooter:
    Multi Format
    hello leon,

    obviously the horseman attachments are a bit thicker than the mamiya ones. I had the inverse problem to fix a horseman back to a mamiya 23 graflock back. the mamiya sliders wouldn't slide over the horseman back. by adding a thin washer under the sliders it worked, but then the mamiya attachments wobbled a bit. so try to add a tiny strip of hard plastic sheet between the back and the sliders, just where the sliders would go (upper side, not camera side). if it works, glue them. it solved my problem anyway. hope it helps.

    reinhard
     
  3. keithwms

    keithwms Member

    Messages:
    6,070
    Joined:
    Oct 14, 2006
    Location:
    Charlottesvi
    Shooter:
    Multi Format
    Hmm, I had a VH and the fit was perfect with the 6x7 and 6x8 backs. Perhaps the 985 is a little bit different. What Reinhard suggests sounds reasonable- some sort of shim or light seal.
     
  4. Leon

    Leon Member

    Messages:
    2,075
    Joined:
    Dec 1, 2003
    Location:
    Kent, Englan
    Shooter:
    Medium Format
    Thanks guys - I double checked the back, and there were a couple of thin plastic shims stuck inside that were preventing the back being mounted properly! Reinhard - I think you must be clairvoyant. I;ve removed them and the rb67 mounts perfectly, and the horseman 69 also mounts with no problem. I wonder why they were there??? no matter now though.

    thanks once again

    Leon
     
  5. xya

    xya Member

    Messages:
    299
    Joined:
    Jun 13, 2010
    Location:
    Calais, Köln
    Shooter:
    Multi Format
    hello leon,

    there is a horseman 6x9 polaroid back which is bit thicker than normal attachments. maybe someone used this an that camera. anyway, nice to hear that the problem is solved.

    kind regards

    reinhard
     
  6. Leon

    Leon Member

    Messages:
    2,075
    Joined:
    Dec 1, 2003
    Location:
    Kent, Englan
    Shooter:
    Medium Format
    BTW - I've put together a short video review of the camera to show how it all works (I found there was a shortage of info online).

    You can view it here
     
  7. mr. mohaupt

    mr. mohaupt Member

    Messages:
    81
    Joined:
    Mar 28, 2009
    Location:
    NC
    Shooter:
    Medium Format
    Damn you Leon... I had never seen a Horseman 985 but it's exactly what I want MF with tilt/shift/rise ect...

    Nice video though... Now I just have to explain to the wife....

    ~M
     
  8. Steffen Alexander

    Steffen Alexander Member

    Messages:
    24
    Joined:
    Mar 12, 2009
    Shooter:
    Medium Format
    Could you describe this in more detail? I've tried to mount my RB67 backs (PRO-S and PRO-SD) on my 985 without success. There is a gap between the camera and the back. What shims do you mean?

    thanks
    steffen
     
    Last edited by a moderator: Dec 21, 2011
  9. Leon

    Leon Member

    Messages:
    2,075
    Joined:
    Dec 1, 2003
    Location:
    Kent, Englan
    Shooter:
    Medium Format
    steffen - they were thin pieces of adhesive backed plastic about 2 cm long and 4mm wide and 0.5mm thick - these were stuck on the lips at the back - I removed them. I have two rb67 backs that I use without issue now. they fit fine with no gap at all.
     
  10. mgb74

    mgb74 Subscriber

    Messages:
    2,988
    Joined:
    Jan 24, 2005
    Location:
    Minneapolis,
    Shooter:
    Multi Format
    Have you used the Mamiya back yet? I'm curious if the film plane (spacing relative to the ground glass) is the same.
     
  11. Leon

    Leon Member

    Messages:
    2,075
    Joined:
    Dec 1, 2003
    Location:
    Kent, Englan
    Shooter:
    Medium Format
    I've used them quite a lot, but only at relatively small apertures. They are sharp. I'll try some wide open to see if there is any discrepancy.
     
  12. Leon

    Leon Member

    Messages:
    2,075
    Joined:
    Dec 1, 2003
    Location:
    Kent, Englan
    Shooter:
    Medium Format
    I've done some close up pics recently using the mamiya backs and a 150mm schneider symmar s. no focus issues at all. All is sharp where I want it to be: 6876214511_b3d3720bba.jpg
     
  13. mgb74

    mgb74 Subscriber

    Messages:
    2,988
    Joined:
    Jan 24, 2005
    Location:
    Minneapolis,
    Shooter:
    Multi Format
    That's certainly good to know. And a great photograph.
     
  14. europanorama

    europanorama Member

    Messages:
    218
    Joined:
    Aug 10, 2004
    Shooter:
    Med. Format Pan
    good not to have.....

    good i dont have one.... a wife......
    which versions have back-rotation?
    btw: loud music at the beginning is disturbing also the one inbetween.
    regarding focus-precision:
    i was told that horseman-backs differ from others, but it was meant for the 4x5-ones.