Yup, that is the question. Both, the EXIF of pictures taken at 200mm on the lens and later on doing AFMA, FoCal also recorded the 200mm setting on the lens to be 180mm. So what is the deal? Is it a 70-180mm lens? Or if I were to do the arithmetic on the 70mm side, it ends up being a 63-180mm lens. So what am I missing? I mean why does it report a 10% lower focal length?