Lensbaby Edge 80 Optic with Cleaning Kit 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) 5 multi-coated glass elements, in four groups Compatible with Lensbaby Composer Pro, Composer, Muse, Scout and Control Freak Aperture range from f/2.8 through f/22