Jobo Modification for 5x7 Film

Discussion in 'Darkroom Equipment' started by MikeK, Jan 14, 2007.

  1. MikeK

    MikeK Member

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    Today I picked up some additional Jobo drums and reels I found on Craigs list. I got them home and was cleaning them and inside a 2553 drum was a modified 4x5 sheet film holder. Very simple modification. It was taken apart and then glued to the center rod. Low and behold it takes a 5x7 sheet of film.

    It is a close fit but looks like it will work and should be able to take at least 4 sheets. Not sure how well it will work but I will be giving it a try.

    Thought I would pass this along :smile:

    Regards

    Mike
     
  2. Denis P.

    Denis P. Member

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    Mike,

    could you provide a quick photo of this contraption?

    Thanks,

    Denis
     
  3. TimVermont

    TimVermont Subscriber

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    Yes, Please. I tried this once using rubber o-rings to hold the upper and lower halves apart, but the films (only 2 per side) touched in the middle of each sheet. They also came out during washing.
     
  4. Rolleiflexible

    Rolleiflexible Member

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    I tried this once as well, to no end.

    I have, however, come upon a way to increase my processing capacity for 5x7 negatives. Pick up an expert series 3005 Jobo tank. It's the tank that allows you process 5 8x10 negatives or prints at one time. In the darkroom, pair up the exposed negatives, connecting each pair with a cellophane tape hinge on the back of the sheet along the 7-inch side, creating a 7x10 inch sheet. Put the joined negatives into the tank as you would single 8x10 sheets. You can process 10 5x7s at a time this way.

    The only downside to doing this is that the tape traps the antihalation dyes underneath it. But with my TXP, at least, it comes out in the wash after 40 minutes or so.

    Sanders