At 04:16 PM 2/4/2005 +0100, Neil Snape wrote:
>I thought you might be interested in this scan of 3 prints , scanned on my >Epson 4870 with low USM at 2400DPI at 100%. >It may put an end to the resolution wars as you can clearly see they are >just different. The Epson R800 drops are definitely finer yet detail >restitution are none the less good on all three, and as usual the HP can >pull out detail with the lower resolution printing. If I printed out at >MaxDPI the HP wins in this count, yet the drops would be the same size. >The Epson 800 has problems keeping those small dots aligned causing bands. >These bands are however so fine that in the end you can t see them. The >banding however with the gloss optimiser is readily seen both in the scan >and at normal viewing. >Any questions? Good stuff, Neil. The only suggestion would be to at least standardize or specify what area of the print is shown in the scan, ie. 1" x 1" or whatever. I have seen similar comparisons elsewhere, and tried to get my friends on the Epson WF list to contribute samples also... but no takers. What I found with my Canon S9000 was that its dots were much finer than either Epson's or HP's... but it had a nasty vertical microbanding that compromised the output. Here are a few print scans.. Each one represents exactly 1" by 1" on the print (except as noted.) Canon S9000: http://www.terrapinphoto.com/canon_band1.jpg Canon S9000, but not 1" x 1": http://www.terrapinphoto.com/pot_scan2.jpg Epson 1160: http://www.terrapinphoto.com/epson_1160.jpg Epson 750: http://www.terrapinphoto.com/epson_750.jpg Epson 7000: http://www.terrapinphoto.com/epson_7000.jpg A fellow named Jack Yeazel started an effort along these lines which I contributed to... but it seems to have languished. You can see it here: <http://www.gpsinformation.org/jack/Printer-Test/printer-prints.html> That's my S9000 up there, alongside all those HP and Epson desktops. It did very well (IMO) but for the microbanding. The pot_scan JPG above was done for Jack's site. Here's another site with lots of print-sample comparisons, although a bit dated: <http://www.silverace.com/dottyspotty/issue9.html> What's interesting about all this is that finer dots don't necessarily translate into a sharper print. It's that old "accutance" thing. Finer dots usually do help with tonality in the highlights, however. rafe b. http://www.terrapinphoto.com -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.8.5 - Release Date: 2/3/2005 Website: http://groups.yahoo.com/group/HPDesignJet_Printers Post message: [email protected] Subscribe: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] List owner: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/HPDesignJet_Printers/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
