Rokinon, aka Samyang, has released an interesting lens kit. There is a base module and then 3 different sets of optics you can swap out inside of it:
- 21mm f/3.5
- 28mm f/3.5
- 32mm f/2.8
These lenses are tiny and full-frame. Check on the weight on the optical blocks:
The set is available for the Sony FE mount and comes at a price of $399 USD.
To make lenses this small there has to be sacrifices in the optical formula. Sometimes these sacrifices can create an interesting look, and at other times they add offensive elements. So how did Rokinon do? It looks like they came up short, unfortunately.