"SUNFOTO 612B is a multi-format roll film holder for 4X5 camera which allows you to shoot 6X45, 6X6, 6X9 and 6X12. You can change the format even after loading the film. The data of uploaded image: Format: 6X12 Focal length: 25mm Pinhole: 0.2mmφ Exposure time: 5 sec. For further details, e-mail me! Ciao, Dr.And / A-Power Inc."