Batis Zeiss lens 2.8/18, designed not to Zeiss
It is known that the company «producing» electronics are often bought on the side of not only mass production, but design. These practices sometimes resorted and manufacturers of photographic equipment.
The source found that the optical design of the Zeiss lens Batis 2.8/18 are completely identical optical scheme of a full-frame lens with a focal length of 18 mm and a maximum aperture of F/2.8, patented by Tamron. In other words, the Batis Zeiss lens 2.8/18, designed not in the Zeiss, and Tamron.
We will remind, in 2015, it became known that manufactures Zeiss lenses Batis company Cosina.