IQ. I didn’t expect much from a lens that have almost 17 times zoom ratio. So far; this lens actual surprises me. The IQ is a tad above average. ManyX-shooter have been asking how is this lens compare to XF70-300mm lens? Nothing to compare as they are created differently. XF70-300mm only have a 4 times zoom ratio. And thus the IQ is better and that is a fact. As for XF18-300mm, its greatest asset is it focal range. And that is another fact. The minimum focusing distant at 18mm is at an admirable 15cm. 300mm its about 1 meter. This lens is very commendable. This is a “all in one” lens for those who are looking for something like this.