For Fujifilm APSC cameras the lens type is mount X, while for medium format lenses use mount G.
So, we want to discuss the X mount, there are 2 types, XC and XF. The XF type lens has a qualified optical and body construction, and is usually made of metal so the quality is better. In addition, this type of lens has a barrel to change the aperture on the lens. This type of lens is still made in Japan.
As for the XC lens, it is made so that the selling price is more affordable. Part of this lens body is made of plastic and weighs less. Usually many XC lenses are packaged with cheaper Fujifilm cameras, which are usually made in China and the Philippines.
