Mamiya Angle Finder FA401 presents a simplified and comfortable method to view your composition when photographing at waist-level, macro or low angles. It is ideal for closeup, copy work, or any situation where the photographer is placed in a difficult position when using his/her camera. The finder delivers laterally correct, unreversed image for right-angle viewing. The finder rotates up to 360° vertical to the camera's viewfinder when mounted on the camera. Its diopter adjustment ranges -5 to +3 to accommondate near or farsighted vision.