SQ-i 120 6x6cm 120-12 exp. Features an ASA film speed dial and an Exposure Compensation setting (+/- 2 stops) which couple to viewfinders with a built-in exposure meter. The Bronica film back interchangeable system makes film changes very simple, for matching changing conditions and purposes. And, simple film changes make for smooth shooting, even when there are lots of shots to take. There is a wide range of formats to choose from. Furthermore, film back exchanges are not possible without inserting a dark slide which cannot be removed from a detached film back.