It can be used to overcome one of the last remaining limitations of digital cameras compared to their film counterparts: their inability to take very long exposures. Image Stacker can also be used to reduce the appearance of "digital noise" in images created by digital cameras or scanners. Limitations: · While Image Stacker will operate without registration, it is limited to processing 10 images with sizes no larger than 640x480 pixels. [ read more about Image Stacker >> ]