Archived posting to the Leica Users Group, 2001/02/07

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Subject: RE: Re: [Leica] how can the 75 Lux focus go bad?
From: "Austin Franklin" <austin@darkroom.com>
Date: Wed, 7 Feb 2001 10:49:34 -0500

> > I disagree.  If you take the same lense, and use it on ANY size
> film, at the same distance, you will get the same DOF.  >Optics
> doesn't know what the film size is, and adjust it self accordingly.
> 3' IS 3', no matter what the film size is.
>
> That is like saying that a 24mm lens @f8 on 35mm has the same depth of
> field as a 500mm lens @f8 on 35mm if you enlarge the 24mm image
> sufficiently.

No it is not what I said.  I said, quite clearly, that the same 50mm lense
at 3' gives the same DOF on both 35mm and 4x5 film.

Replies: Reply from "Jason Hall" <JASON@jbhall.freeserve.co.uk> (Re: Re: [Leica] how can the 75 Lux focus go bad?)