Step by step guide: https://www.dinolite.us/support/how-do-i-use-the-auto-calibration-feature-in-dinocapture/ Auto calibration is now possible with Dino-Lite Edge Series models using the CS-40 or CS-41 Auto Calibration target. During the calibration process, the software will identify special QR codes to make calibration quick, easy and accurate. For more information visit: http://www.dinolite.us/ Contact our technicians with any questions: support@dinolite.us