*On 12.02.2010 05:12, emre wrote: > Thank you for the recommendation. I looked at the fi-6130 & it seems/ > quite nice. I originally had in mind a flatbed scanner, but this looks > like it will be more generally > useful & convenient... actually the more I think about, I think fi-6130 > will be a better > choice for my needs. I looked at and subsequently rejected the > fi-6230... I prefer > the smaller footprint of the fi-6130. > > 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
