Why the hell is this about equivalence? So far as I am aware if you have a Fuji camera you can't put a Sony FE 28mm f2 on it anyway. Do you think you're intending to sell all your Fuji gear because the optically inferior FE lens is more affordable? https://link-fuji18876431.bligblogging.com/27485242/5-simple-statements-about-fuji188-explained