The Mamiya-Sekor F4N Macro C is an 80mm macro lens designed for Mamiya M645 cameras. It provides a high resolving power not only in ordinary picture-taking but particularly in close-up photograph and copying. It is made of 6 elements in 4 groups and has an angle of view of 47º. Using the Macro C 80mm f/4, one can focus up to 1/2 life-size without using an accessory. By applying the optional Auto Macro Spacer, which is specially designed for this Macro C 80mm, one can go up to life-size from 1/2 life-size magnification. The lens fitted with a built-in floating system, which is designed to automatically compensate for increasing typical aberrations with close focusing distances to obtain sharp resolution down to the edges of the picture.