Optical zoom is the amount by which a subject’s distance—as seen through the viewfinder—can be changed by changing the position of the lens. This is done manually or by using tiny electric motors. Digital zoom, on the other hand, is simulated by the sensor in the camera. In digital zoom, the camera crops part of the image and enlarges the remaining portion. This results in loss of detail. For cameras, the optical zoom figure is much more important than the digital zoom, which can be simulated in image editing software like Photoshop.