Mamiya M645 + Sekor C 80 mm f/2,8 + AE-Prism, fotocamera medio formato, pellicola 120
The prism has a line in the viewfinder glas (like almost all prisms), see last pictures. It doesn't obstruct the view too much, because your eye will focus on your subject, which plane of focus is much further away than the line Condition Lens.