U of S | Mailing List Archive | alt-photo-process-l | Re: Sorry to ask again but...

Re: Sorry to ask again but...

Sandy, when Judy posted this, I had exactly the same question; but your comment 
makes perfect sense. I'm using the E2450, with its maddening film holders, and yes, I 
get fine DofF, if I use a holder or just lay the film on the glass.

And to demonstrate this, I can relate a story. About month ago, because my father has 
just died, I moved his entire collection of 20,000 negs and slides back to Phoenix with 
me for cataloguing, scanning, rephotographing, and so forth. Along with them, I dragged 
a boxload of old prints that I need either to scan or rephotograph with 4x5 or 8x10. One 
of these turned out not to be a print at all, but a tintype of my grandfather, shot sometime 
between about 1880 and 1885. I scanned it so I could email it to a brother, and it turned 
out GREAT. This is no ordinary tintype. What somebody did to the poor thing over the 
years, I don't know, but it's buckled, and bent to hell. It even has two sharp punctures 
into it, that raised the tin surface more than 1/8th of an inch. Flat it is not. But the scan 
showed the entire thing in perfect focus. Clearly, then, the DofF on these scanners is 
deeper than a piece of film. 

Makes it tempting to try a few of those body-part scans people used to make by climbing 
onto the xerox machine back in the '70s. Or has Ender.dot.com been there already and 
back again?


On 29 Aug 2006 at 20:22, Sandy King wrote:

Date sent:      	Tue, 29 Aug 2006 20:22:54 -0400
From:           	Sandy King <sanking@clemson.edu>
Subject:        	Re: Sorry to ask again but...
To:             	alt-photo-process-l@usask.ca
Send reply to:  	alt-photo-process-l@usask.ca

> Judy,
> There are many different kinds of flatbed scanners and I don't know
> where the place of best focus in on all of them. However, all of the
> ones I have used appear to have the point of best focus not on the
> surface of the glass of the scanner but at somewhere around .5mm to
> 1mm from the top. That is suggested by various film holders
> themselves.