This is a Mamiya Eye Piece Magnifier for Mamiya M645 Prism Finders.
This magnifier will go over your eyepiece and allow you to magnify the center for critical focusing. Even has a built in diopter adjustment. This eyepiece is in Excellent Condition and shows normal wear. IF YOU WANT CRITICAL FOCUSING, THIS IS WHAT YOU NEED!
WE SHIP IN 1 BUSINESS DAY as well we package professionally and will combine to save on shipping cost. We are also interested in BUYING your photographic equipment as well. We are Camera Exchange in Waterford Michigan.