The Sony FE 20-70mm f/4.0 G is a zoom lens designed specifically for Sony's full-frame E-mount cameras. With a focal length of 20-70mm, this lens offers a versatile wide-angle to standard range, making it ideal for a wide range of photographic applications, such as landscape photography, street photography, portraits and more. 

The maximum aperture of f/4.0 is constant across the entire zoom range, offering consistent exposure and control over depth of field. The internal focusing system and linear motors enable fast and silent focusing, while the optical construction of 16 elements in 12 groups ensures sharp images with high contrast and minimal distortion.