Sony A7 III and A7R III Firmware Update 2.0
(Photography Blog)

Sony have released a major firmware update for the A7 III and A7R III cameras. Version 2.0 adds support for the 400mm f/.28 GM and 24mm f/1.4 GM lenses, improves LA-EA3 mount adaptor support, and offers better reproduction of the gradation of RAW pictures.