Mod 54 for 5x4 process
Mod 54 for processing 5x4 negatives and slides
The MOD54 Mk27 is the lastest version of this insert for the Paterson 3 reel tank. Its allows you to process 6 sheets of 4x5" fillm. The Mk27 version is a total reworking of all previous models. The new design is very robust, has rounded edges and gives streak free development.