DPI (old mac expression) - dots pr inch - or more correctly ppi - pixel pr. inch is relative to the media that should show the image. A photo realistic print is often 300 ppi when printed. If you enlarge 4 times (4x6") the scanning should be at 1200 ppi (a 35mm neg is appr. 1 inch high).
So, the basic math is this: A 1 inch neg scanned at 1200 ppi can be printed at 300ppi when it is enlarged 4 times = 4 inches. There's no reason to scan at higher resolution if you just want 4x6" prints. The banding can be caused by many things: Wrong paper/surface Wrong paper settings in software Wrong Ink Clogged nozzles Paper feed is in accurate Check it or try different settings. Regards Jens Jens Bladt http://www.jensbladt.dk -----Oprindelig meddelelse----- Fra: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sendt: 10. februar 2006 19:10 Til: [email protected] Emne: Re: Digital darkroom frustrations! You shouldn't be scanning your negative at 360 dpi. You do want to END UP with a ready for the printer image that's sized at 360 dpi. For example, an 11 x 17 image area at 360 dpi would be about 72 megabytes. To arrive at that kind of resolution, you'd have to scan a 645 negative at a relatively high res. I'd guess 3000 dpi minimum. What I would do is scan the neg at the maximum the scanner allows, then downsize slightly in PhotoShop if necessary. Paul -------------- Original message ---------------------- From: Pål Jensen <[EMAIL PROTECTED]> > Aaaargh...Just got the replacement Epson R2400 printer just to experience > that this one also give horizontal stripes (paper in portrait position), > although not as pronounced as the first one. Everything is different from > when I had the first sample: the software is new, printer driver is new, the > printer is new, I use a new scanner. I've tried all kinds of DPI settings > (BTW why do Nikon insist that I set the DPI at 360 on a 4000DPI scanner?). > Paper selection is correct. Yes, I run the cleaning and head adjustment > procedures to no effect. What is going on? It cannot be rocket science to > get decent prints from printer, or is it? > Anyway, I'm not that impressed with the whole setup; apart from the stripes > the Nikon 9000 scanner and the R2400 printer gives only borderline photo > quality prints at best. Maybe its just my standards thats to high. > > Pål > >
