Digital BW, The Print

Yes, Bob, I'm familiar with the physics behind this,
most people with normal vision can "resolve" 600 dpi
at 5" distance, most people with normal vision cannot
distinguish above 300 dpi at 10" distance.
Given how we normally look at photos, I think that 
is why most experts recommend 300 dpi as a good
file resolution. For poster size photos you can probably
go safely below 200 dpi, as most people would not
normally look at them with a loupe.

Regards

Andrei
  ----- Original Message ----- 
  From: Bob Frost 
  To: DigitalBlackandWhiteThePrint@yahoogroups.com 
  Sent: Saturday, March 12, 2005 4:48 AM
  Subject: Re: [Digital BW] Scan resolution for printing 4x5 negs?


  Andrei,

  Actually it has been proven that some people with good eyesight can see 
  improvements in prints up to 600 ppi:-

  http://www.clarkvision.com/imagedetail/printer-ppi/index.html

  and

  http://www.clarkvision.com/imagedetail/eye-resolution.html

  Bob Frost.



  ----- Original Message ----- 
  From: <aderca@...>

  250 to 300 dpi is pretty much considered a standard for
  good resolution files that you send to the printer (so after
  you scan at 1600 dpi, you can enlarge sufficiently to get
  down to 250-300). I doubt very much that you can see
  a difference between a 300 dpi file and a 600 dpi sent
  to the printer, regardless of the caliber of the output machine.



  Please visit the Group Homepage to check the Files, and other resources as they are often being updated.

  http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint

  If you wish to receive no emails or just a daily digest, or you wish to unsubscribe, please edit your Membership preferences by visiting this same page.

  Please follow these basic guidelines:
  - As threads develop, trim off excess portions of earlier messages to keep them short.
  - Good manners are required at all time. No personal attacks or flames. Hostile, aggressive or argumentative users may be removed from the membership without notice.
  - Keep your posts and threads related to the group topic of digital B&W printing. Users who persistently make off-topic posts may be removed from the membership.
  - By posting on this forum you agree to abide by the group rules and guidelines, and to abide by the actions and decisions of the group Owner and Moderators. See "Group Topic, Rules and Guidelines" in the Files section:
  http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/files/

  BY PARTICIPATING IN AND/OR POSTING MESSAGES TO THE DIGITAL BW, THE PRINT YAHOO! GROUP YOU EXPRESSLY UNDERSTAND AND AGREE THAT THE "OWNER" AND "MODERATORS" OF DIGITAL BW, THE PRINT YAHOO GROUP SHALL NOT BE LIABLE TO YOU FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR EXEMPLARY DAMAGES, INCLUDING BUT NOT LIMITED TO, DAMAGES FOR LOSS OF PROFITS, GOODWILL, USE, DATA OR OTHER INTANGIBLE LOSSES (EVEN IF THE  "OWNER" AND "MODERATORS" OF DIGITAL BW, THE PRINT YAHOO GROUP HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES), RESULTING FROM: (i) THE USE OR THE INABILITY TO USE THE DIGITAL BW, THE PRINT YAHOO GROUP; (ii) UNAUTHORIZED ACCESS TO OR ALTERATION OF YOUR TRANSMISSIONS OR DATA; (iii) STATEMENTS OR CONDUCT OF ANY THIRD PARTY ON THE DIGITAL BW, THE PRINT YAHOO GROUP; OR (iv) ANY OTHER MATTER RELATING TO THE DIGITAL BW, THE PRINT YAHOO GROUP.



        Yahoo! Groups Sponsor 
              ADVERTISEMENT
             
       
       


------------------------------------------------------------------------------
  Yahoo! Groups Links

    a.. To visit your group on the web, go to:
    http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/
      
    b.. To unsubscribe from this group, send an email to:
    DigitalBlackandWhiteThePrint-unsubscribe@yahoogroups.com
      
    c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. 



[Non-text portions of this message have been removed]