This is a rare negative carrier used to rapidly make enlarged proof sheets or print up to 9 images at a time. The negative carrier holds 3 strips of 35mm film up to 6 exposures long. By sliding the carrier left or right you can select which group of 9 you wish to print. You can then enlarge them and cut them up into individual photos or leave them together like a giant proof sheet. This negative carrier will work with most 4x5 sized enlargers, works well with LPL or Omega. It is pretty neat.

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