Archived posting to the Leica Users Group, 2008/12/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Aram, SLR's can have the same problem but primarily with auto focus issues. I bought a nikon AF 105 f2 a couple years ago that had terrible back focus issues on my D2H. I had to return the lens. Len On Dec 14, 2008, at 10:37 AM, Aram Langhans wrote: > 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 > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information