Archived posting to the Leica Users Group, 2004/02/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Maybe this was covered by others (I can't keep up with all the posts). Here is my understanding of why digital has greater DOF: There are two reasons: 1) You are shooting with a (for example) 50mm lens cropped to a 75mm field of view. Therefore, you are getting the deeper DOF of the wider 50mm lens with the apparent field of view of a longer 75mm lens. The effect is that of a 75mm lens with a deeper field of view. It is identical, however, to shooting & cropping on film. 2) The circle of confusion in digital is smaller than in film. This means that even with a full frame sensor, digital should have deeper apparent field of view. In this regard, currently the cheaper P&S cameras have the smallest pixel sizes (around 3 microns) and therefor are the resolution champs, and should have the smaller circle of confusion (assuming the lens is up to the job). Bob Rose - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html