Lensbaby Edge 80 Optic

The Edge 80 Optic is a 80mm, flat field of focus optic with a 12-blade adjustable aperture and is compatible with all Lensbaby lens bodies.  When tilted, the Edge 80 delivers a slice of tack sharp focus through the image, bordered by soft blur.  When pointed straight ahead, the Edge 80 can be used just like a high-quality straight lens.  

When tilted, the size of that slice of focus depends upon the aperture used, and the placement of the slice of focus depends upon the degree and direction of tilt. Rotating the aperture dial on the front of the optic changes between apertures from f/2.8 through f/22.