Archived posting to the Leica Users Group, 1999/06/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Please pardon a question from an ignorant one. This 30, 50, and 100 formula establishes the hyperfocal distance, does it not? If that is so, how--precisely--does one then know the depth of field? OR .. do I misunderstand "hyperfocal distance?" i.e., does "hyperfocal" mean that the far distance will be infinity ... and there I may have answered my own question, but will appreciate confirmation or refutation from those more knowledgable than myself. Excerpts from leica: 14-Jun-99 Re: [Leica] Tri-Elmar and D.. "Richard E. Baznik"@po.c (697*) > Richard: > In response to Mike's questions, I wrote in part: > >"Perhaps other T/E users who are more mathematically > >inclined have found a pattern in the DOF table that could > >lead to a "compute in the head" approach." > And there you are!!! Thank you!!! I should read all posts before > responding.///Dick Baznik > _________ > At 10:35 PM 6/13/99 -0400, you wrote: > > > >Just remember the numbers 30, 50, and 100. > > > >28mm: Divide 30 by the f-number. > >35mm: Divide 50 by the f-number. > >50mm: Divide 100 by the f-number. > > > Richard E. Baznik > Vice President for Public Affairs > Case Western Reserve University > 10900 Euclid Avenue, Cleveland, Ohio 44106-7021, U.S.A. > Voice: (216) 368-2338 > Fax: (216) 368-6674 rwyble@erols.com Richard J. Wyble