Re: DOF and angle of view or focal length (long)

[Dag T]

One problem is that if the CoC is much less than the usual number 
today, 0.035mm, the diffraction limit comes into play.  With a CoC at 
half this value, 0.017mm, you will never achieve a sharp image with the 
aperture set at 22.

DagT

P� 22. mar. 2004 kl. 17.18 skrev Peter J. Alling:

The Circle of confusion required for an acceptable depth of field 
changes depending on the format.
The smaller the sensor size, the smaller the cof must be.  Also the 
desired enlargement factor
should also be taken into account, (although that last is difficult).  
This unfortunately isn't hard science
it's more like cooking.