Lens Construction 14 elements in 12 groups, including 2 AA (advanced aspherical) elements and three ED (Extra-low Dispersion) glass elements; Nano AR Coating; Fluorine front-element coating.

At 10mm, central sharpness is outstanding at f/4 and f/5.6, excellent at f/8 and f/11, very good at f/16 and fair at f/22. The edges are excellent at f/4 and f/5.6, very good at f/8, good at f/11 ...