Exposure time

When scanning, the exposure time determines the length of time light falls on the sensor. If all other parameters remain constant, the picture becomes brighter with increasing exposure time. In inexpensive cameras, the exposure time is regulated by a mechanical shutter and it is set how long the shutter stays open to let the light through when taking the picture. The shutter then closes and no further information reaches the sensor.

In contrast, in our systems, we are using our X71 camera, which works with an electronic shutter. The 71 megapixel camera was especially designed for demanding continuous use in the digitization sector, providing a long service life. Therefore, the camera does not work with a mechanical fastener that is susceptible to wear. In order to regulate the time in which the sensor receives information, the sensor is electronically darkened and hence completely motion-free. This guarantees constant and reproducible exposure times even with high-volume digitization projects. The use of highly sensitive area sensors also reduces the duration of the necessary exposure time and, as a result, the scan time, thus supporting the most gentle and productive scanning.

The exposure time can also be individually regulated using our Easy Scan scanning software, which is very helpful, for example, when digitizing transparencies. Due to the changing film and transparency templates, it may be necessary to adjust the exposure time individually in order to obtain optimal results, regardless of the film density, material or pigment type.