The World’s First* Standard Zoom Lens Achieving Full-range F1.7
"The full-range F1.7 aperture provides beautiful bokeh and high descriptiveness. Covering a focusing distance from wide angle to standard zoom range, this lens functions as a multiple fixed focal length lens providing the same or an even higher level of descriptiveness than a fixed focal length lens can offer. It is suitable for a variety of shooting situations, from dynamic landscapes to portraits even in low-lit scenes, dispelling the need to change lenses.
*As a digital interchangeable lens for a mirrorless camera, as of May 31, 2019."
High-speed, High-precision AF and Focus Clutch Mechanism
Compatibility with a maximum 240-fps high-speed sensor drive realizes high-speed, high-precision auto focusing. Adoption of a focus clutch mechanism enables instant AF/MF switching and accurate manual focusing.
Beautiful, Smooth Video Recording
This lens excels in video recording performance. In addition to the silent operation achieved by the inner focus drive system, the stepless aperture ring and micro-step drive system in the aperture control section help the camera to smoothly catch up to brightness changes when zooming or panning. The optical design achieves exceptional barycentric stability to minimize image shifts during zooming. This lens also features a mechanism that suppresses focus breathing.
Outstanding Optical Performance
Comprising 17 elements in 12 groups, the lens system features three aspherical lenses and four ED (Extra-low Dispersion) lenses that effectively suppress the axial chromatic aberration and chromatic aberration of magnification. Spherical aberration and distortion are also corrected by the aspherical lenses for stunningly high resolution. The use of aspherical lenses and the optimum design of the lens system results in a compact size and light weight despite its outstanding optical performance.
Rugged Dust/Splash-resistant Design**
"The rugged dust/splash-resistant design withstand use under harsh conditions even in 10 degrees below zero for high mobility. Highly reliable metal mount endures long time use.**
**Dust and Splash Resistant does not guarantee that damage will not occur if this lens is subjected to direct contact with dust and water."
