I'm conducting a lens calibration test for my Canon 180mm macro. I've narrowed the best auto focus micro adjustment (AFMA) down to a ballpark somewhere between -5 and -1 points. I'm having a hell of a time in PS trying to tease out the sharper image. Is there a way to enhance the images in such a way to make the winner make itself obvious? I tried adding Smart Sharpen, but it's still too close to call. If you're going to say I should split the difference and choose -3 points, I hear ya. But I want to be perfect.