Revised optical design features two extra-low dispersion and three aspherical elements; these specialized elements limit various aberrations and color fringing for high sharpness and color accuracy.
Improved optical design is also inherently more flare-resistant for stronger contrast when working in bright lighting conditions.
Special attention has also been given to bokeh rendering, with an emphasis on producing smooth and natural transitions between in- and out-of-focus regions for a more three-dimensional look. Aspherical element manufacturing has been improved for a smoother look, and the lens also now has 11 rounded diaphragm blades for a more rounded bokeh appearance.
Minimum focusing distance has also been significantly shortened compared to the previous generation—9.4" at the 24mm position and 1.1' at the 70mm position, with a 0.32x maximum magnification at the minimum focusing distance from the 70mm position.