I have read that it is eight lines per millimetre for perceived sharpness, which agrees pretty much with William Rob's 10 lines per millimetre. That says something about enlarging 35 mm slides/negs for sharpness.
If a lens resolves 80 lpm, the theoretical limit for sharpness is 10 magnifications, or a 350 millimetre print (11 x 14). However, we are always going to lose something in the transfer through the enlarger lens and elsewhere in the process. Maybe you can get away with your favourite shot at 4 lpm and normal viewing distance. But it says someting about why medium format has the edge. Peter Jesser Brisbane, Australia >From: "William Robb" <[EMAIL PROTECTED]> >Reply-To: [EMAIL PROTECTED] >To: <[EMAIL PROTECTED]> >Subject: Re: right eye (was MZ-S Cost...Hey Pentax.) >Date: Thu, 4 Oct 2001 21:34:43 -0600 > >----- Original Message ----- >From: "Nenad Djurdjevic" <[EMAIL PROTECTED]> >To: <[EMAIL PROTECTED]> >Sent: Thursday, October 04, 2001 7:25 PM >Subject: right eye (was MZ-S Cost...Hey Pentax.) > > > > Just what is the resolution of the human eye. Do any of the >biologists out > > there know? Obviously there are a certain number of light >sensitive neurons > > (rods and cones) in the retina and the number of these must be >quantifiable. > > So how many "megapixels" are we talking about? It would be >interesting to > > find out. > >I don't know about the number of receptors, I recall reading >somewhere (it was probably a Zone VI newsletter) that a well >corrected human eye can resolve about 10 lines per millimeter at >it's closest focus distance. Hence, if a finished print resolves >greater than that, it will appear "sharp" at any viewing >distance. >William Robb >- >This message is from the Pentax-Discuss Mail List. To unsubscribe, >go to http://www.pdml.net and follow the directions. Don't forget to >visit the Pentax Users' Gallery at http://pug.komkon.org . > _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
