The Dino-Lite Pro Digital Microscope 10X-50X 220X 1.3M handheld digital microscope comes with our high quality 1.3 megapixel image sensor that views and takes highly detailed images for professionals. The MicroTouch (touch sensitive static sensor) feature on the handheld digital microscope gives users the option of taking a picture right from the scope itself. The MicroTouch was designed to minimize image blur while taking a picture with the microscope. Great for those moments when you need to take a picture, but having a hard time reaching the computer.This unit provides variable magnification depending of distance with the highest magnification at 220X. Options that are also included with the Dino-Lite handheld digital microscope is the DinoCapture imaging software that lets you view, take pictures, and annotate images right from your computer. Calibration is a comparison between measurements-one of known magnitude or correctness made or set with one device and another measuremen