XPost: alt.windows7.general, alt.comp.os.windows-10, alt.comp.ha   
   dware.pc-homebuilt   
   XPost: alt.comp.os.windows-10   
   From: nospam@nospam.invalid   
      
   In article , +++ATH0   
    wrote:   
      
   > >> One other factor to bear in mind: the depth of field varies with lens   
   > >> focal length, not field of view of the subject.   
   > >   
   > > actually, it's aperture.   
   >   
   > actually, it's the ratio of focal length to aperture.   
      
   nope. depth of field is a function of physical aperture.   
      
   what you describe is f/stop, which is used for exposure purposes, and   
   in some cases (usually movies), t/stops are used, which is actual light   
   transmission through the lens, not a simple ratio.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)