The images with a Fuji XF 18-135mm lens are typically soft at aperture 5.6 and require higher sharpening in the RAF converter (for example Capture One). The best image quality is generally at apertures from 8 to 11, shutter speed 1/500 sec. and shorter, ISO from 200 to 1000.
Samples
https://photos.app.goo.gl/Dd5A7GzJm2JAWZkx9