Thank you Jeff,
Your posting enlighted my mind: now I know why Leonardo dissected dead bodies: he looked for younger, better, sharper lens...
But I'm 100% sure, if they (masters) had had modern technical, optical equipment they would have used it, only because time sparing. Imagine the huge output!
Cheers!
P.S. Jeff, long time ago I wrote some stuff about Leonardo.
http://forum.portraitartist.com/show...&threadid=2612