The Lensbaby Sweet 35 Optic is a 35mm, selective-focus optic with a 12-blade adjustable aperture that provides unprecedented creative control over the size of the sweet-spot and the amount of blur. This is the widest focal-length selective-focus Lens baby optic currently available, and the first to feature an adjustable, internal aperture. Rotating the aperture dial on the front of the lens changes between apertures from f/2.5 through f/22. The Sweet 35 Optic is part of the Lensbaby Optic Swap™ System.