So, for the Kenko for example, the correct aperture is not recorded or read by the body, so does that means that we get underexposure or overexposure? If that is the case, a simple exp compensation of 1 stop or 2 stops might be the solution, only somewhat cumbersome, and at times, in the heat of the shooting, we might forget to do it, and the entire shooting is screwed up. So, Kenko is cheaper, optically great but.....
