Why the hell is this about equivalence? So far as I do know if you have a Fuji camera you can't place a Sony FE 28mm f2 on it anyway. Will you be intending to sell all your Fuji gear as the optically inferior FE lens is less expensive? No, https://linkfuji18898764.webbuzzfeed.com/27465563/link-fuji188-an-overview