Ilford Delta 100 Professional 5x7 - 100 Sheets BTZS Focus Hoods For articles on BTZS film

For articles on BTZS film testing

Canham 4x5 Rear Standard

Extended Fix Times & Film Density Densitometers - Choosing & Building Working in a Vacuum

The Canham cameras are modular by design & the 4x10 & 5x12 cameras can be converted to a 4x5 using the 4x5 rear standard

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