Digital BW, The Print

The focus thing isn't just epson flatbeds.

I have two scanmaker III's and one is much sharper. Or rather, one much worse.

I mistakenly developed some unexposed 4x5 and used these sheets to Sharpie mark and layered them on the glass bed to see which was sharper. The FP4 was maybe too thick for this test..

I suspect that a degree of OOF is built-in to minimize dust and scratches.

But ...

gar
.

*********** REPLY SEPARATOR  ***********

On 1/4/08 at 9:52 AM Doug Fisher wrote:

>>>The tests I've seen show that the 4990 is capable of resolving about
>2100
>ppi. So it would seem that scanning at anything higher is just increasing
>the file size without gaining anything in useful information. I use a 4990
>with 4x5 and 8x10 negatives.<<
>
>That is about right.  You might want to do some shimming tests to see if
>you
>can eek out a bit more sharpness.  Every bit helps with these scanners.
>Norm Koren discusses this.  Here are two links that show examples:
>
>http://www.normankoren.com/Tutorials/Epson_flatbeds.html#Focus_spacing
>
>http://www.larry-bolch.com/ephemeral/4870-shims.htm
>
>This example shows the difference when you hold the film really flat and
>then adjust by only .2 mm (click on the image to enlarge it and see the
>text
>in Internet Explorer):
>
>http://farm3.static.flickr.com/2035/1664778870_ba674a82da_o.gif
>
>
>Doug
>---
>BetterScanning.com - Innovative Accessories for Better Film Scanning
>http://www.BetterScanning.com/
>
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