As camera sensors have changed in size, from model to model, so too must their appropriate focusing screens--and their appropriate crop marks as well. The apertures in the 54 x 40 Focusing Screen for RZ67 Cameras and an Aptus II 12 Digital Back from Mamiya are different for different digital backs, and each is designed specifically for the given combination of camera and digital back.
The 54 x 40 Focusing Screen is great for accurate composition when using an Aptus II 12 digital back, when combined with a RZ67 camera. It is useful for general purpose photography, and is designed to fit and function perfectly within this unique system.
Designed to fit 54 x 40 sized RZ67 cameras and an Aptus II 12 digital back only