Zeiss is a German manufacturer of optical systems and optoelectronics, founded in Jena, Germany, in 1846 by optician Carl Zeiss. Together with Ernst Abbe and Otto Schott he laid the foundation for today's multinational company. From Wikipedia
The launches underscore diverging chip and camera strategies, with Hasselblad staying on Oppo, Zeiss on Vivo, and reports indicating OnePlus will switch to an in-house imaging engine on Snapdragon hardware.