• Three extra-low dispersion elements are used to greatly reduce color fringing and chromatic aberrations in order to produce high clarity and color fidelity throughout the zoom range.
• Three aspherical elements control distortion and spherical aberrations, which helps to improve sharpness and realize more accurate rendering.
• Nano-GI (Gradient Index) coating has been applied to lens elements and alters the refractive index between the glass and air in order to better suppress lens flare and ghosting for diagonal incident light.
• A Twin Linear Motor autofocus system delivers smooth, near-silent performance that is especially beneficial to video applications and when working in noise-sensitive areas.
• Rounded nine-blade diaphragm contribute to a pleasing out-of-focus quality to benefit the use of selective focus and shallow depth of field techniques.
• The lens body incorporates extensive weather sealing to protect against dust and moisture, and to enable worry-free use in inclement conditions and freezing temperatures as low as 14°F.
