Samyang is providing free firmware updates for four of its lenses that are specifically relevant to videographers, as they improve their eye autofocus in video mode and also AF performance.
The Samyang AF 45mm F1.8 FE lens for Sony E will be updated to firmware version 4, the Samyang AF 35mm F2.8 FE for Sony E to version 6, the Samyang AF 24mm F2.8 FE for Sony E to version 6, and the Samyang AF 18mm F2.8 FE for Sony E to version 3 (the latter being the only one to miss out on the eye autofocus improvement in video mode and make do with an improvement in AF performance.
Samyang AF 18mm
Every user of one or more of the mentioned lenses is advised to install the respective firmware. The updates are free of charge, but a so-called Samyang Lens Station is required to install the software on the lenses. It is screwed onto the lens like an adapter and then connected to a computer via USB. There is a separate Lens Station for each mount, costing about 80 euros. If you don't have your own Lens Station, you should ask your dealer.