Compatible with all SQ, SQ-A, SQ-Am and SQ-Ai camera bodies, the Bronica 45D S prism is ready to change the way you see the world. Providing a laterally correct, upright viewing image it takes the confusion out of composition and allows you to function more smoothly and with a minimum of effort. As an added plus, the 45 degree viewing angle helps keep your neck and shoulders relaxed and stress-free. Eyes not what they used to be? The continuously variable built-in diopter is adjustable from +0.5 to -2.5 power.