Samyang has released Firmware Update 3 for the Samyang/Rokinon AF 85mm F1.4 FE lenses offering improved AF performance in burst mode and with Sony a9.
The Firmware can be installed using their Lens manager dedicated software Lens station and sorry fellow Mac users, it appears to be available for Windows only.
Samyang also reports they are working on developing an update to enable better AF performance in burst mode with a9 Firmware Version 5.00.
Order Samyang AF 85mm f/1.4 Lens for Sony E from B&H Photo | Amazon
Order Rokinon AF 85mm f/1.4 Lens for Sony E from B&H Photo | Amazon
