Very useful
Thanks for the link. It leads to a downloadable version for my Palm PDA, among others. I tried it and it is completely customisable to suit whatever circle of confusion you wish to select. This means you can dial in a more critical setting for work which is going to be printed large, like landscapes, for example. 
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Hartblei 35mm 2.8 super rotator, Sigma(A)24/2.8, Sigma 10-20, SMC 35/2.0, SMC(A)50/1.4, Jupiter 85/2, SMC(A)100/2.8, 100/4 bellows lens, FAJ18-35, DFA 100/2.8 macro, bellows, loadsa tubes, converters, flashes and junk
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