Problems with Canon EF 50mm f/1.8 Lens

On Tue, 13 Jul 2004 20:40:28 +1000, " Miro" wrote:


"DJ" wrote in message
.. .
On Tue, 13 Jul 2004 03:16:07 +1000, " Miro" wrote:



DOF is not an exact number, it relates also to human tolerance of
focus
variance. Mathematically this is repersented as a 'circle of confusion'
correction factor.

The threshold at which an image is seen as in-focus is a precise number.

Yeah??

The
final judge is perceptual acuity not mathematical probability. At any
given
range an image is sharp for a given set of conditions.

There is no need to limit the tolerance to infinite precision if the goal
is
attained.


And in English ... ?

What you see is what you get. You dont need an Excel spreadsheet to figure
that out.


So you are saying "if it looks sharp it is sharp"?