How long does it take a scanning back to capture an image?
Two factors determine the overall scanning time for any given image: the EXPOSURE TIME PER LINE, which is affected by the amount of light reaching the image sensor, and the NUMBER OF LINES in the image being captured. The EXPOSURE TIME PER LINE is called the “Line Time” setting, expressed in traditional photographic fractions of a second. The Line Time setting, in combination with the ISO sensitivity setting, determine the response of the scanning back to light reaching the sensor, which in turn is controlled by the amount of light on the scene, and the lens aperture setting. The Line Time setting is equivalent to the shutter speed setting in an instant-capture camera, but in a scanning system this exposure gets repeated for each line being recorded in the final image. The NUMBER OF LINES in the image is a function of the Resolution setting for a particular scanning back model, and of any cropping in the scan direction. Seamless panoramic scans made with Better Light’s Pano/WideView ad
