Sony FE 16-35mm f/2.8 GM from the professional G Master series is a new lens intended to be used in landscape and architectural photography.
The optical system consists of 16 elements placed in 13 groups, including 5 aspherical lenses and 2 made of low-dispersion glass. Such a solution is to ensure perfect focus within the whole frame view and minimize chromatic aberration. Additionally, the lenses are covered with Nano AR coatings, which are supposed to reduce light reflection and ensure high contrast. The front lens is additionally covered with a fluorine coating, which makes it easier to clean the lens from dirt and other forms of contamination.
1). Sony FE 16-35mm f/2.8 GM with Sony Alpha a7R
Similarly to other lenses from the G Master series, Sony used a 11-blade aperture. A well-known system of two ultrasonic DDSSM motors is responsible for adjusting focus.
The whole construction is, of course, sealed and it weighs 680g, which is a good result for such a professional lens.
2). Sony FE 16-35mm f/2.8 GM
The lens is to appear on sale in August and it will cost $2200.