abel deuring wrote: > *On 12.02.2010 05:12, emre wrote: > >> >> I have one more question, it has to do with resolution. The fi-6130 >> reports a 600 dpi >> resolution (which seems to me to be more than sufficient). I have seen >> some Epson >> scanners that report 6400 dpi. I am guessing that higher resolution >> might be good >> for slides and photos, but wouldn't be of much use for scanning documents? >> Thanks again, >> > > I have serious doubts that even any affordable slide scanner really has > such a high resolution; for a scanner that can scan an A4 or letter size > document, 6400 dpi sounds ridiculous. You would need very precise and > expensive optical and mechanical components to really achieve such a > high resolution. > > Also, consider the size of an A4 size scan with 6400 dpi: That would be > 210*297*6400*6400/(25.4*25.4), nearly 4 billion pixels. IOW, you could > fill a terabyte disk with just 250 uncompressed gray scale images... > > Typical scan resolutions for A4/letter size are 200 or 300 dpi -- what > you need depends on your use case, the number of scans you want to store > and on the storage capacity you can and want to afford. > > Abel > > I just verified at the epson.com website for the Epson Perfection V600 printer, and they do report 6400 dpi for their optical resolution. Granted, it would take a lot of disk space, but it would also seem beneficial to have this resolution for archiving of slides and negatives. Now, if they really have this resolution, I can not say... & I am ordering the fi-6130 since that seems more than sufficient for my purposes. -Emre
png of epson perfection brochure
