The Composer Pro II with Edge 50 Optic is a 50mm f/3.2 high-quality tilt photography solution in an upgraded external metal Composer Pro body with charcoal gray accents and improved tilt function. This very versatile 50mm lens excels at landscapes, street-photography, close-ups and more. Tilt the Composer Pro II with Edge 50 Optic to create images with a sharp slice of focus bordered by gradually increasing blur to highlight the subject of your image, lead the viewer's eye, and tell a unique story via selective focus. When tilted, the size of the 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 lens changes between apertures from f/3.2 through f/22. The Edge 50 also features a special close-focus function. Photographers can extend the front of the optic to focus as close as 8" away from their subject. The Edge 50 Optic is part of the Lensbaby Optic Swap System.