I think we talked about this a little while ago on here, but I couldn't find the discussion. Why exactly did we come up with the magic formula being 58mm for a PF? All that I can recall is someone said, "I remember hearing or reading somewhere about an experiment where that ended up being the magic number for proper extraction."
That's not really good enough for me. Why don't we try using really shallow 100mm PF? Why do some companies use 53?
An area I need a little insight on. Someone help me out?
-bry
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