The camera was designed to be a multipurpose unit for professional use. It could be used as a conventional drop front lightweight field camera. But with the rear extended, it became a large scale, long focus studio 'stand' camera with full adjustments. It came in three sizes - this one is a 5x7" and comes with a set of original double dark slides. Whole plate (8 1/2" x 6 1/2") and 8"x10" versions were available at much higher cost.