The 48-bit ArtixScan 1800f combines an optical resolution of 3, 600 x 1, 800 dpi and an impressive 4.8 Maximum Optical Density resulting in amazingly sharp, detailed image capture for the demanding standards of service bureaus and pre-press environments. Microtek's patented dual platen design accommodates a variety of reflective, positive, and negative film originals - from 35mm up to 8" x 10". This professional scanner features glass-free transparency scanning to ensure that only the original image is captured, and not the unwelcome artifacts introduced by glass, to yield superior image quality.