If you want, you can build your own Four Thirds camera by following the FourThirdsEye GitHub project (Click here). You might be able to build your own PEN-FII :)
Description of the project:
Welcome to the FourThirdsEye project, an open-source camera board designed for Raspberry Pi 5 and Raspberry Pi Compute Module 4 boards using a Micro Four Thirds format image sensor IMX294. This project aims to provide a high-quality, affordable, and accessible camera module for advanced Raspberry Pi projects. The board is designed using KiCad v6, a popular open-source electronics design automation (EDA) software.
FourThirdsEye captures 10.7 Mpix images and 4K (4096 x 2160) videos with improved low-light performance and dynamic range (4.63 um pixel size). It’s perfect for photography enthusiasts, developers, and makers who want to level up their Raspberry Pi projects with a powerful camera.