Hasselblad A12 6X6 120 Film Back

The Hasselblad A12 film back is the quintessential 120 roll-film back for Hasselblad 500 Series medium format cameras (part of what is now known as the Hasselblad V System). Unlike the original 'Hasselbald 12' roll-film backs, the A12 automatically stops on frame number one when loading and queuing a fresh roll (with the previous version it was possible to accidentally waste part of a roll if not careful). | The A12 fits twelve 'six by six' (56x56mm) format (a.k.a. two and a quarter inch format) exposure frames on a 120 length roll film. This is a complete film back (also sometimes referred to as a film magazine) that consists of three main components, the exterior 'shell' (which mounts to the camera body), the 'film insert' where a roll of 120 film is to be installed, and the 'darkslide' which prevents film from being exposed when the A12 is not attached to a camera body. Hasselblad hand machines (and serializes) the shell and insert components to match each other (shell and insert serial numbers match unless noted otherwise).