Ian Grant
Subscriber
All the Speed Graphics use a continuous curtain with a number of fixed width slits, usually four.
The Thornton Pickard Company in Altrincham near Manchester in the UK were the pioneers of early roller blind shutters and held a number of Patents including variable slit focal plane shutters. John Edward Thornton left the company in 1899 and went on to licence his film pack to ROC (later EK) and early tri-colour cine film to Eastman Kodak.
Presumably the Graflex shutter curtain was a way around the Patents.
Ian
The Thornton Pickard Company in Altrincham near Manchester in the UK were the pioneers of early roller blind shutters and held a number of Patents including variable slit focal plane shutters. John Edward Thornton left the company in 1899 and went on to licence his film pack to ROC (later EK) and early tri-colour cine film to Eastman Kodak.
Presumably the Graflex shutter curtain was a way around the Patents.
Ian