The "new-ish" M8 came, the VC 15mm f4.5 M-mount came the same day. A great looking pair, feels great. I could get used to a range finder. Unfortunately, I'm not able to get sharp photos until about f8 on the VC, and even then it's not as sharp as say the Fuji with the 14mm F2.8 at any aperture. I have just this one lens. Is there a way for me to tell if the problem is with the camera or the lens? Here are test shots at f4.5, f5.6, f8, F11, and f16. All were focused out to infinity, where I would expect sharpness. I have others where zone-focus was used, to see if the near field would come into focus. Not any better for near-field, unfortunately. As can be seen the sharpest is f8. F4.5: F5.6: F8: F11: F16 Can this be attributed to just the camera or lens?