Can't get my head around spring back

Discussion in 'Camera Building, Repairs & Modification' started by mark, Sep 12, 2005.

  1. mark

    mark Member

    Messages:
    5,270
    Joined:
    Nov 13, 2003
    I just cannot get my head around the designing of the film back. For some reason this has stymied me.

    If anyone has drawn up plans for a 7x17 or 5x12 back would you mind forwarding it to me so i can see what you did.
     
  2. Donald Miller

    Donald Miller Member

    Messages:
    6,242
    Joined:
    Dec 21, 2002
    Shooter:
    Large Format
    Mark,

    My 12X20 Korona with a Burke and James back had the same design as my 4X5 Zone VI and my 8X10 Deardorff. The design is consistent throughout.
     
  3. mark

    mark Member

    Messages:
    5,270
    Joined:
    Nov 13, 2003
    SO I should be able to use the 5x7 back as a guide? Cool. I was concerned that there would need to be some sort of extra support.
     
  4. barryjyoung

    barryjyoung Member

    Messages:
    411
    Joined:
    Jul 31, 2005
    Location:
    Near Seattle
    Shooter:
    ULarge Format
    How to build whatever size springback you need

    Hi Mark:

    Please visit

    http://www.srv.net/~vail/camera.htm

    If you go all the way to the bottom of that page you will see a list of sketches. You are looking for the sketches labelled "Back (inside View)", "Back (Outside View)", and "Groundglass Frame".

    Alter the interior dimensions to match your film holder and the outer dimensions to fit your camera. Use your 5x7 back for reference.

    Best of luck

    Barry Young
     
  5. Dave Parker

    Dave Parker Inactive

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

    As long as you have the registraion distances correct, you should not have much problem, the design of a spring back is really one of the simplest forms of backs for cameras, you just need to make sure when designing that the GG sits in the same plane as the film in the film holder so that you get true focus..

    Dave
     
  6. Eric Mac

    Eric Mac Member

    Messages:
    118
    Joined:
    Oct 16, 2004
    Location:
    City by the
    Shooter:
    35mm RF
    diy back

    Mark

    drop me an email and I will send (loan) you a copy of instructions on a 4x5 back from the infamous aletta camera.

    Eric
     
  7. noseoil

    noseoil Member

    Messages:
    2,898
    Joined:
    Oct 6, 2003
    Location:
    Tucson
    Shooter:
    Multi Format
    Mark, use a film holder for your setups. Make sure you have one first. tim