Lensbaby Composer Pro Lens with Edge 80 Optic for Canon Focal Length: 80mm Aperture range from f/2.8 through f/22 Tilts from zero to 17.5 degrees. 12 blade internal aperture, controlled by a dial on the front of the optic Flat field of focus optic (when tilted, creates a slice of sharp focus, bordered by blur) Compatible with the Lensbaby Optic Swap System