I can‘t find such a setting in the manual. If you are referring to „Eye sensor + LCD image display“, this means that the LCD will show a taken image after you took your eye from the viewfinder.
Yeah, I meant the X70, which has a 18.5mm lens. Sorry for the confusion. And, I did not know there is a converter for the X70, too.
Even though discontinued you might get one new. No information yet about a successor.