Archived posting to the Leica Users Group, 2005/08/29

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Subject: [Leica] Hyperfocal Focusing
From: msmall at infionline.net (Marc James Small)
Date: Mon Aug 29 12:32:19 2005
References: <3.0.2.32.20050828184739.020876b8@pop.infionline.net> <410-220058028161847625@edge.net> <3.0.2.32.20050828184739.020876b8@pop.infionline.net>
 
At 12:03 PM 8/29/05 -0400, Chris Saganich wrote:
>
>Somewhere I think you mixed up cm and mm?  Perhaps circles of confusion 
>1/1000 is 0.0025mm or a factor of 400?

Hmm.  I certainly am most capable of error as many others on the LUG will
gladly tell you!

But the calculator on my computer insists that 25.4 (the number of mm in an
inch) divided by 1000 is 0.0254 which, when inverted, yields a
multiplication factor of roughly 40 (39.37, to be precise).  

1/10 of 25.4 is 2.54.  1/100 is 0.254.  1/1000 is 0.0254.

Marc



msmall@aya.yale.edu 
Cha robh b?s fir gun ghr?s fir!

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Replies: Reply from chs2018 at med.cornell.edu (Chris Saganich) ([Leica] Hyperfocal Focusing)
 In reply to: Message from msmall at aya.yale.edu (Marc James Small) ([Leica] Hyperfocal Focusing)
Message from nicholsj at edge.net (Jim Nichols) ([Leica] RE: LUG: Hyperfocal Settings for Quick Shooting)
Message from chs2018 at med.cornell.edu (Chris Saganich) ([Leica] Hyperfocal Focusing)