Samyang released firmware updates for the Samyang AF 35mm f/1.4 FE, Samyang AF 85mm f/1.4 FE, Samyang AF 35mm f/2.8 FE, and Samyang AF 24mm f/2.8 FE over the past few weeks. The updates can be download here.
Samyang AF 35mm f/1.4 FE: B&H Photo / Amazon / Adorama
Samyang AF 85mm f/1.4 FE: B&H Photo / Amazon / Adorama
Samyang AF 35mm f/2.8 FE: B&H Photo / Amazon / Adorama
Samyang AF 24mm f/2.8 FE: B&H Photo / Amazon / Adorama