SP-445: A New Small and Simple Developing Tank for 4×5 Large Format Film
Long-time film photographer Timothy Gilbert was frustrated with existing options for processing 4x5 large format sheet film at home, so, as an engineer, he decided to create an easy-to-use and affordable system himself.
After several prototypes and extensive testing, what he came up with is the SP-445 processing system, an extremely compact and simple tank that requires minimal chemicals and effort.