Did a side-by-side comparison between the Zeiss 12mm and the Sony 10-18mm above water. Not surprisingly the Zeiss 12mm F2.8 being a prime has sharper corners than the 10-18mm @ 12mm F4. For pixel peepers who don't mind noisy AF, the Zeiss 12mm is a great choice. Since the Sony 10-18mm has silent autofocus, smoother video AF performance, noticeably wider FOV, and Optical SteadyShot, it's a more useful lens overall and definitely a better video lens IMO.
The Zeiss 32mm F1.8 is also very good optically just like the 12mm, and its AF is also noisy just like the 12mm - perfect for photography or shooting video without AF. For video overall, the Sony E 35mm F1.8 OSS is a better choise IMO.
- Mark K likes this