Archived posting to the Leica Users Group, 1998/02/06
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> From: BenTroGa@aol.com > To: leica-users@mejac.palo-alto.ca.us > Subject: Re: [Leica] Macro Question > Date: Thursday, February 05, 1998 6:40 AM > > Frank: For simplicity: Same size image + same aperture = same depth of field. > (No matter whether it is a 15mm or 1000mm focal length, if the aperture is the > same, and the image size is the same, the depth of field is identical. Period. The depth of field calculator at: http://ue3.ee.nus.sg/DOF.html contradicts the above statements. For 35mm film a 50mm f1.4 lens focused at 100 feet gives a depth of field of 138 feet, a 100mm f1.4 lens focused at 200 feet gives a depth of field of 110 feet. Any comments?