The Lensbaby 3G lens is a workhorse for photographers who require precise focusing, complete control, longer exposures, and repeatability. When working with dynamic subject matter you can focus Lensbaby 3G just like Lensbaby 2.0 -- by compressing and bending. For slower moving or static subject matter, you can lock the lens in place simply by pressing a button on the focusing collar. Then you can fine focus using a traditional barrel focusing ring and fine tune the tilt to place the sweet spot exactly where you want.Lensbaby 3G features the same low dispersion, high refractive index, multi-coated optical glass doublet as Lensbaby 2.0, and delivers images with a tack sharp sweet spot with minimal diffusion even at the f/2 aperture setting. Lensbaby 3G uses the same system of magnetically levitating aperture disks as Lensbaby 2.0 with aperture settings of f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16, and f/22.