The Critical Focus Magnifier, otherwise known as the Variable Diopter 2X Flip-up Magnifier, is shown in "down" and "flipped-up" position.
Attached to the prism finder, it assures enhanced precision focusing by magnifying the central portion of the screen 2 times. After focusing, flip it up for normal viewing.
Featuring 3 lens elements in 2 groups, it produces an un-reversed and laterally correct image. Particularly useful for critical manual focusing with all lenses, as well as for copy work and macro photography. Built-in -5 to +3 diopter correction when used with the standard diopter lens supplied with Mamiya 645AF.
To attach the Critical Focus Magnifier, slide it upward around the viewfinder's eyepiece frame.
