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.