This is the eyelevel prism finder for all of the RB cameras. It yields an upright non-reversed image. It is a big advantage for portrait photography and eliminates the worm's eye view that you can get with the waist level. This is the Pro-S version with the locking release. It fits on all versions of the RB67 as well as the RZ67 This prisms shows moderate to heavy cosmetic wear. The glass is clean and scratch-free and everything works perfectly.