Topic Depth of field
 
  Optimal depth of field is the most important property of the (photo) world for a photo fan. The limits of a "sharp" image are very simply limited by optical physics. A "depth of field calculator" for home use is calculated and set up - it always works (without smartphone power)

Real measurements with a Canon EOS complete my trip into the applied optics.
Presentation On 19 pages you will find all about depth of field for 1.4 MB file size
Data An Excel sheet with 5 pages and 440 kB file size is available
Notes "Solid" mechanics for everyday use
March 2015