Scanning film with a diffused/scattered light source, such as a transparency adapter, through the thick glass of a flatbed scanner results in a blur image with loss in fine details. A dedicated scanner, on the other hand, utilizes a linear light source projecting through the film directly to the imaging lens without a glass in between, resulting in a sharp and crisp scanned image. As with a traditional camera, higher illumination (aperture) results in shorter exposure time (shutter speed). The linear lightsource offers much higher illumination than that of a transparency adapter, and therefore, enables a dedicated film scanner to scan at a much higher speed than a flatbed scanner with an adapter. Films are likely to have dusts, scratches, and other defects no matter how careful you store them, and Digital ICE™ technology, designed specifically for dedicated film scanners, is by far the most effective tool to automatically remove these defects during scanning. Due to the fundamental difference in design architecture, an ordinary flatbed scanner is incapable of an ICE implementation. You would end up spending hours retouching your high resolution images with an image editing software.