Viltrox is working on a new AF 28mm f/4.5 VCM ASPH ED full-frame autofocus pancake lens for Sony E and Nikon Z mount (previously reported here):
Viltrox has a patent for what appears to be a new 28mm pancake autofocus full-frame lens. The patent number is CN308440949S – it was filed on July 20, 2023, and it was published on January 26, 2024: