Modifying Calumet C400 back

Discussion in 'Camera Building, Repairs & Modification' started by paul ewins, Jan 5, 2006.

  1. paul ewins

    paul ewins Subscriber

    Messages:
    418
    Joined:
    Jan 5, 2006
    Location:
    Melbourne, A
    Shooter:
    4x5 Format
    Hi, I want to modify my C400 so that a grafmatic will fit. The only reason it won't, as far as I can tell, is that the leaf springs aren't long enough. I don't have the facilities to work with spring steel, so I'm looking for other ideas. Coil springs can be easily found, but the leaf spring also keeps the moveable part of the back square to the rest of it (i.e. allows movement in one axis only - in or out). Has anybody attempted this modification before?

    Before anyone points out the obvious (use a DD, not a grafmatic) the various advantages of the grafmatic have wone me over and I would rather not use DDs at all if I can avoid it.

    regards,
    Paul
     
  2. bobfowler

    bobfowler Subscriber

    Messages:
    1,440
    Joined:
    Sep 18, 2003
    Location:
    New Jersey,
    Shooter:
    Multi Format
    Hmmmm... Interesting...

    Graphmatics fit the 4X5 back for my C-1 just fine. I thought that they used the same GG frame and springs.
     
  3. Dave Parker

    Dave Parker Inactive

    Messages:
    4,049
    Joined:
    Aug 14, 2004
    Shooter:
    Multi Format
    There is not reason the grafamatic should not fit the C400 back, the grafamatic was designed to be the same thickness as a double sided film holder, and hence should fit the back..

    Dave
     
  4. glennfromwy

    glennfromwy Member

    Messages:
    278
    Joined:
    Nov 3, 2004
    Shooter:
    Multi Format
    A Grafmatic is 1 1/2 times the thickness of a normal film holder. I haven't used my view camera in a long time but I remember that these have quite a long throw on the back and the Grafmatic should fit. If not, do what I do to make it work on a Busch Pressman - put washers under the springs, to shim it out to the proper position.
     
  5. Dave Parker

    Dave Parker Inactive

    Messages:
    4,049
    Joined:
    Aug 14, 2004
    Shooter:
    Multi Format
    Sorry Glen,

    It has been a long time since I used one and I guess in my old age, my memory is failing, I remembered them not being much thicker than a standard film holder..

    Back to making glass for me I guess! LOL

    Dave
     
  6. paul ewins

    paul ewins Subscriber

    Messages:
    418
    Joined:
    Jan 5, 2006
    Location:
    Melbourne, A
    Shooter:
    4x5 Format
    Of Course! I should have thought of simply shimming the springs out further from the back. That should do the trick nicely.

    If grafmatics fit under the C-1 back OK, maybe I've ended up with shorter springs.

    Anyway, problem solved and many thanks. On to the next project....

    Paul