Nokia Mobile confirmed in a tweet that it will no longer be using Carl Zeiss technology. Carl Zeiss lenses were used in several camera phones by Nokia such as the 808 PureView, the Lumia 920 and Lumia 1020. As for PureView, the imaging technology is currently owned by Microsoft.
It's such a pity that future Nokia phones will not come with either of these optics hardware and technology. Nonetheless, Nokia Mobile reportedly confirmed that it will still invest in imaging technology.