I’m Back MF 6×4.5 CM LONG focusing screen.
Comptaible with the following I’m Back MF adapters:
- MA1: Mamiya 645 J
- PEN1: Pentax 645
The focusing screen is where the image is registered by at the I’m Back MF device and therefore it must always be clean. Many times, the shutter itself, because it has dust inside the camera, can deposit small residues that, if not removed, will be recorded in the photography. To clean this surface, use an air jet and, if necessary, alcohol. Avoid contact with fingers as it may leave an oily stain on the surface.