The Edge 80 optic works with several of the Lensbaby systems, including Composer, Muse, Scout, and Control Freak. I tested it with the Composer Pro. The optic itself is one of the largest, and doesn't collapse completely into the body the way some of the others do. In part that's because of the built-in macro extension tube.
Unlike the sometimes overly convoluted designs for changing apertures in previous Lensbaby optics, the Edge 80 offers the best design to date: a wide, rubberized old-fashioned aperture ring. The narrower rubber ring focuses.