The first G MasterT standard zoom from Sony with a constant maximum aperture of F2 is ideal for portrait photography and many other subjects. The F2 aperture, top-notch optics, and mobility meet the demands of even the most discerning professionals. Sharpness and contrast rival that of a prime lens, while the brightness, unparalleled autofocus, zoom, and compact, lightweight design offer an extraordinary creative range for both photos and videos.