Acceptable DOF changes based on a number of things. Print size, viewing
distance etc. However all other things aside the smaller the circle of
confusion the greater the DOF and the COC is directly related to the
aperture.. However sharpness will be effected by diffraction as the
aperture gets smaller. It really is quite complicated and in some ways
quite subjective. In fact I think DOF is the most subjective thing
possible to discuss even while calculations with hard numbers are still
involved.
John Celio wrote:
DoF changes somewhat between formats. Also I've generally found that
the acceptable CoC used for DoF marking calculations is rather
optimistic for digital use (30 micron CoC's don't play well with 6
micron sensor sites)
Could you restate that in less technical language? I'd appreciate it.
Also, how exactly does DoF "change somewhat"? What causes this change?
John
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