Why the hell is this about equivalence? So far as I'm sure In case you have a Fuji digicam you can't put a Sony FE 28mm f2 on it anyway. Will you be going to provide all your Fuji gear since the optically inferior FE lens is more cost-effective? No, https://lukasvdjrx.angelinsblog.com/26705057/link-fuji188-an-overview