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Kim
Joined: 10 May 2001 Posts: 44 Location: upstate NY
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Posted: Fri Jul 27, 2001 12:45 am Post subject: |
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Here is an update on my 3x4 project. I am modifying the back to fit 4x5 film holders. Essentially I have done three things; I reset the side rails to accommodate the 4x5 holders, I cut a new key slot and removed the end block so that a 4x5 holder will come just to the edge of the back(this puts the new key slot 3/16" from the edge), and I extended the edges of the spring back itself to fit the new slot. Removing the stop block at the end caused some light leak problems and so I have added (for now anyway) a piece of weather strip)
The polaroid 545 backs will fit a standard 4x5 springback, the 405 back however is too thick. You can shim out the springs using longer 4/40 screws, which I did for awhile, but I found that the springs did not hold a standard cut film holder very tightly after I did that. Recently I made the spring extensions shown in the pics. The construction should be fairly obvious from the picture, the spring material was cut from the blade of a spackling trowel (buy the ones that say "flexible blue steel")These extensions work very well on both my 4x5 and on the modified 3x4, they will extend to hold a 405 back yet still keep a standard cutfilm holder tight.
Hope this is useful
Kim Hartshorn
http://faculty.plattsburgh.edu/kim.hartshorn/images/camera.htm |
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Kim
Joined: 10 May 2001 Posts: 44 Location: upstate NY
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davidst
Joined: 17 Jul 2001 Posts: 4 Location: Minnesota
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Posted: Sat Jul 28, 2001 4:31 pm Post subject: |
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Kim,
That is really impressive ingenuity! Thanks for sharing your experience.
Todd |
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