Using glass-mold aspheric lenses at the 5th and 7th elements, is effective to in increasing the maximum aperture (5th element) and reducing the overall thickness of the lens (7th element).

Fujinon XF 18mm f/2 R

It's construction is good and so is it's size. But it's probably the worst Fuji lens when it comes to image quality. Corners are soft even stopped down and the lens suffers form field curvature.

small; "special&quot

-bad