The Mamiya Sekor AF 80mm F2.8 D Lens allows fast and easy selection of auto or manual focus mode as it features an auto/manual focus ring. Its barrel cover is made of turned aluminum treated with black alumite.The focusing ring of the Mamiya 80mm F/2.8 D Focus Lens is rubberized to make quick access of manual focusThe Mamiya Sekor Focus Lens is used for 645 format camera and has a field of view similar to human sightIt is used for both close and distant subject photographyThe Mamiya Sekor AF 80mm F2.8 D Lens uses a 16 bit CPU, which makes it to allow easy firmware upgrading, and lens characteristic correctionIt offers reliable communication between the lens, camera body, and digital back