Sometimes the autofocus on your lenses may not be exactly where you want it. Fortunately, it’s an easy fix as most modern cameras offer “micro adjustment” or “fine tune” option that lets you calibrate autofocus of attached lenses. You do need a calibration tool to do it, though. However, Karl Talyor offers you a simple calibration method without buying (or making) a special tool for it. In this video, he’ll show you how to do it for $0 and in just a few minutes. All you need is a few items that you already have at home.