One man's introduction is another's dissertation on irrelevant esoterica ...
Most of the material was included for those who might wonder where some
oft-quoted formulae (as well as a few myths) come from.
In a practical sense, I tend to agree with Don. At least in my experience,
90% of what's needed in the field is covered by Eqs. 20 and 22, whether
you're using LF or a hand camera (one that has DoF scales, anyway ...), and
whether or not the lens is tilted.
As several other threads here have indicated, it's also important to choose
a CoC suitable for your own viewing conditions. In particular, if you will
be viewing large prints at 10", or even worse, using a loupe, the standard
values simply won't suffice.
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