Its optical design comprises aspherical elements, extra-low dispersion elements, and a super extra-low dispersion element, all of which help to reduce distortion and color fringing for improved sharpness and color accuracy throughout the zoom range. A fluorine coating has also been applied to protect the front element by repelling water, oil, and fingerprints.
- Three extra-low dispersion elements and a Super ED element are used to greatly reduce color fringing and chromatic aberrations in order to produce high clarity and color fidelity throughout the zoom range.
- Four aspherical elements control distortion and spherical aberrations, which helps to improve sharpness and realize more accurate rendering.