You can play around with different lenses, apertures, CoC, etc with Schneider's spreadsheet: http://www.schneideroptics.com/softw...Calculator.xls

If you don't have MS Excel, this spreadsheet (and nearly all others) works fine in the free (in multiple senses) openoffice calc spreadsheet, available at www.openoffice.org

You could set up your spreadsheet numbers however you want to get the print magnification / reproduction ratios you want to try.

Lee