The world's smallest, lightest ultra-wide-angle constant F4 APS-C power zoom lens combines outstanding mobility and image quality with the creative opportunities that only wide field of view and power zoom can provide. | Internal zoom and focus allows for the lens to maintain its length when focusing or zooming, providing a stable center of gravity that is ideal for vlogging or gimbal-mounted shooting | Expand your possibilities for visual expression with the power zoom system, making it easy to execute super-slow constant-speed zooms and perform other operations that are difficult with manual zoom. Power zoom minimizes camera shake that can occur when operating a zoom ring so that even solo shooters can produce smooth, stable movie sequences. | Two linear motors ensure fast, quiet, low vibration autofocus that can smoothly track subjects when shooting high frame rate movies and reliably follow fast-moving subjects when shooting stills continuously at high speed. Focus is especially critical when shooting rate 4K or 8K movies, which this lens handles with ease. | Advanced lens technology reduces focus breathing as well as focus and axial shift when zooming so that high quality images and movies can be easily captured. This lens also supports the breathing compensation function provided by compatible alpha cameras, further reducing unwanted angle of view shifts during focusing for smooth, high-quality movie footage.