This is a professional scanner and the price may put amateurs off. It can scan large documents with very high resolution. Of course, such scans produce very large scan files. I prefer to scan at high resolution (800+ dpi) and archive the original scan to removable hard drives or the web. One method I use for documents that are even larger than the scanner's range is to scan in higher resolution blocks and merge them back to the original high resolution size. This can overwhelm the computer's ability to handle such a large amount of data, so there are sometimes tradeoffs that users must decide based on their experience.