Archived posting to the Leica Users Group, 2008/12/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks to all for the explanations. Film/sensor and lens design all play a role, it looks like. I would think the film vs. sensor would also effect SLR's, since focusing is not on the film itself. But shouldn't the focus shift as you stop a lens down also effect an SLR? I am assuming that the SLR focuses (auto or manual) with the lens wide open, then stops the lens down to take the photo. So, this should have the same effect as say focusing accurately on a rangefinder for whatever aperture the coupling is accurate, then taking the picture at some different aperture? Does this sound right, or is my retired brain not working correctly? Aram > Date: Sat, 13 Dec 2008 19:00:04 -0800 > From: Peter Klein <pklein@threshinc.com> > Subject: Re. [Leica] M8 upgrade - 90 Cron APO focusing problems now > Question???? > To: lug@leica-users.org > Message-ID: <5.1.0.14.2.20081213185418.0276ce40@mail.threshinc.com> > Content-Type: text/plain; charset="us-ascii"; format=flowed > > In my previous post, I put in an ASCII diagram illustrating focus > tolerance > on film vs. a sensor, and messed it up. Here is a screen clip which > will > show things correctly: > > http://users.2alpha.com/~pklein/temp/FilmVsSensorFocus.gif > > --Peter No virus found in this outgoing message. Checked by AVG. Version: 7.5.552 / Virus Database: 270.9.17/1846 - Release Date: 12/12/2008 6:59 PM