Archived posting to the Leica Users Group, 2000/08/07

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Subject: [Leica] easy calc of hyperfocal distance
From: Dan Cardish <dcardish@microtec.net>
Date: Mon, 07 Aug 2000 17:05:42 -0400
 
I recently read an easy to remember formula for calculating hyperfocal
length.  Divide the focal length of the lens (in mm) by 10, square the
result, and you have the hyperfocal length in feet for f11.

For example, for a 50mm lens, the HFD is (50/10) ^2, or 25 feet.

Can anyone verify the accuracy of this method?

Dan C.
Replies: Reply from Jim Brick <jimbrick@photoaccess.com> ([Leica] Re: easy calc of hyperfocal distance)