The Sweet 35 Optic is a 35mm, selective focus optic with a 12-blade internal aperture that provides unprecedented creative control over the size of the sweet spot and the amount of blur. This is the widest focal length Lensbaby optic currently available, and the first to feature an 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.