The only fff to dgn conversion we know of, would be export of Hasselblad Camera RAW images (.fff) to Adobe Digital Negative format (.dgn). This is a typical example of working with digital RAW formats and you can actually achieve this by using pretty much digital photo editor or converter, such as Adobe Photoshop (Lightroom). Of course Hasselblad also provides software that can be used for this.
Updated: July 24, 2023