Equivalent to 22-44mm Wide Zoom on a 35mm Film Camera F2.8 at Wide is in the Top Stream in Wide Zoom Category 11-22mm has two glass aspherical Lenses that contribute to high image quality • To minimize the distortion • To minimize the spherical aberration and “Koma” aberration. New Multi-coating on the first 2 lenses contributes to removal from the ghost or glare, which is easy to appear through Wide-angle Lens. 11-22mm adopts a Floating technique for the focusing System to materialize the closest focusing distance of 0.28m in the entire zoom range.