[pure-silver] Re: [OT] Filmholders, Septums, Total-Disasters

  • From: DarkroomMagic <info@xxxxxxxxxxxxxxxx>
  • To: PureSilverNew <pure-silver@xxxxxxxxxxxxx>
  • Date: Wed, 23 Nov 2005 17:20:19 +0100

This tolerance problem is real and well documented. Please see my other
note.





Regards



Ralph W. Lambrecht

http://www.darkroomagic.com







On 2005-11-23 17:12, "Michael Briggs" <MichaelBriggs@xxxxxxxxxxxxx> wrote:

> 
> I've measured some modern Lisco and Fidelity holders with a depth micrometer
> and they have been well within the ANSI spec.   Maybe this "guru" doesn't
> understand that the spec has a tolerance (+/-0.007 inch) and that this
> tolerance is quite reasonable compared to the depth of focus at the taking
> aperture.  Maybe they got a bad batch.  Maybe he is trying to sell Toyo
> holders.
> 
> Since you've never observed focus problems with your holders, it doesn't seem
> that you need to throw them away.
> 
> --Michael
> 
> P.S.  Fidelity and Lisco are currently the same manufacturer.
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