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01-27-2011, 03:14 PM   #16
Ira
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You can also scan a few at a time with a scanner.

I have an inexpensive Epson, maybe a hundred bucks, but it does three at a time.

Yes, it takes a long time, but it does it at native 1200 dpi without interpolation. It might even be 2400. Just don't remember.

01-28-2011, 09:58 AM   #17
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Last post (or so it seems :-) from my side,
I've read up a little about slide copying with DSLR's, like here:
https://www.pentaxforums.com/forums/general-photography/124644-automatic-slide-scanner.html

Here's what I found (not necessarily true though :

A good 10-12 Mpix DSLR (with a good setup) will give you something equivalent to a 1500 - 2000 dpi scan. Linear logic woud tell me that my 6 Mpix DSLR will give me equivalents of max. 1000 dpi scans and those 24Mpix DSLR's can theoretically compete with a 4000 dpi scanner.

The optical setup follows all the logics of macro photography, to which newarts has provided some math before (basically a 1:1.5 setup in Pentax DSLR land).
To me it boils down to a good mid- to longrange FL macro lens to give you the best flat and even field performance at close distances.

If I ever get proficient in color-neg-scan-postprocessing I might dig deeper into this.
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