Archived posting to the Leica Users Group, 2005/08/30

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Subject: [Leica] Hyperfocal Focusing
From: msmall at aya.yale.edu (Marc James Small)
Date: Tue Aug 30 10:10:54 2005
References: <3.0.2.32.20050829153143.006d7254@pop.infionline.net> <3.0.2.32.20050828184739.020876b8@pop.infionline.net> <410-220058028161847625@edge.net> <3.0.2.32.20050828184739.020876b8@pop.infionline.net> <3.0.2.32.20050829153143.006d7254@pop.infionline.net>
 
At 10:54 AM 8/30/05 -0400, Chris Saganich wrote:
>Thanks I didn't realize that was an inch to mm conversion, obviously 
>correct, but the millimeters to meters doesn't seem right.  When I do the 
>calculation I'm off by a place.  Isn't 1166 2/3 mm 1.166 meters rather then 
>11.66 meters?


Ah!  You are correct on that one.  1 1/6m would be the hyperfocal distance
for a 35mm lens at f/3.5 with a circle of confusion of 1/1000".  That works
out to about four feet, meaning that everything between 2 feet and infinity
should be in focus.

Marc

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

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Replies: Reply from philippe.orlent at pandora.be (Philippe Orlent) ([Leica] Hyperfocal Focusing)
 In reply to: Message from msmall at infionline.net (Marc James Small) ([Leica] Hyperfocal Focusing)
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)